1. An adequate space margin is one that provides a driver with: All of the above; (space, time, visibility), Graduated Driver License Programs generally involve _____ stages. 4 times. When approaching you vehicle parked at a curb, what should you do? b) .08 to .10 The time taken for this is about the time it takes for the car to travel a distance equal to Sam's thicknessabout 20 centimetres. When you see a potential threat, sign, or traffic control on the road, you dont break instantaneously. Car B must have an engine providing more force than, a. c) perception time a) stimulant Approximately what percent of crashes are caused by driver error? By re-writing the first equation, we can calculate the speed at which the collision occurs: V f = V 0 2 2 a d = 8.2 m e t r e s p e r s e c o n d. (where d = 40 metres minus the reaction distance of 27.1 metres = 12.9 metres). Most states have blood-alcohol concentration limits of __________ percent for drivers under age 21. Scale the circuit so that all capacitors are exactly 0.01F0.01 \mu \mathrm{F}0.01F. 1. If, instead of hitting a pedestrian, the car hits a tree, a brick wall, or some other heavy object, then the cars energy of motion (kinetic energy) is all dissipated when the car body is bent and smashed. 1007 0 obj <> endobj You can ask a new question or browse more science questions. a) 1st drink 4. when braking hard, the weight of the vehicle noticeably shifts ___ Terms of Service. The frictional resistance between the road and the car's tyres is also importanta car with new tyres on a dry road will be less likely to skid and will stop more quickly than one with worn tyres on a wet road. d) all above are correct, An effective control device that is the least used in emergency situations is the: a) accelerating : a) four tires b) brakes c) the steering wheel and column d) the clutch and accelerator c If a vehicle's speed doubles, the forces involved in a collision will be quadrupled. to allow enough distance to stop in respond to threatening objects for conditions, you should identify a planned path of travel how many seconds ahead, under most conditions a minimum following interval of how many seconds will enable you to adjust speed or position appropriately, if a vehicle's speed doubles from 20mph to 40mph, the distance needed to stop the vehicle increases by how many times, when braking hard, the weight of the vehicle noticeably shifts, when turning to the right, the contact patches of which tires will increase in size, You ain't rememering this stuffclinical tech. the large open tread of a snow tire gives extra. If we assume that a is 10 metres per second per second and assume that the road is flat and the braking systems of the two cars are equally effective, we can now calculate braking distance for cars 1 and 2 in our example. b) smell Can atoms of different elements have the same mass number? If a vehicle's speed doubles from 20 mph to 40 mph, the distance needed to stop the vehicle increases by ____ times. Three. c) yellow, green, red You may need a second or two to move your foot to the brake pedal. Braking distance is a measurement of how far your vehicle travels during the time it takes to come to a complete stop once you hit the brakes. when turning to the right, the contact patches of which tires will increase in size. All these factors show that the risk of being involved in a casualty crash increases dramatically with increasing speed. A supercomputer model of the formation of one of the first stars in the universe. Driving a very heavy vehicle does not lessen the effect of the impact much because, although there is more metal to absorb the impact energy, there is also more energy to be absorbed. If you forget it there is no way for StudyStack b) braking c) 500 b) daytime riding lights b) braking time c) emergency vehicle : a) about double the distance b) about 9 times the distance c) about 6 times the distance d) about 3 times the distance a What are the most important parts of the control system? b) 4 The speed time graph shows the motion of a car over a period of 40 seconds. . c) 2 to 4 p.m. d) .02 to .08, You will have ample time and space to make a decision and control your vehicle if you maintain a visual lead of: If friction can be ignored, the _____ of a system doesn't change. That means you should make sure your tires have the right air pressure level and plenty of tread. When a car's speed doubles from 20 m/s to 40 m/s KE increases ______ times. Watch where you are travelling through the back window. When you park and leave a manual shift vehicle, it is best to set the parking brake and shift to: When driving on trips, a good rule-of-thumb is to stop every ____miles or every ____hours and take a break. According to one of the teachers this is. Explain the relationship between inertia and traction. A driver who is distracted, for example listening to loud music, using a mobile phone or has drunk alcohol may take as long as 3 seconds to react. a) .04 to .08 c) 200 The drivers both see the child at the same time and both take 1.5 seconds before they fully apply the brakes. To allow enough distance to stop in response to threatening objects or conditions, you should identify a planned path of travel how many seconds ahead? When a car's speed doubles, what happens to its kinetic energy? b) less than 5 mph For a car travelling at 70 km/h the risk increased fourfold. b) FALSE, PCV stand for: d) all of the above are correct, When you are a new driver and practicing turning right or left with good traction and normal conditions, your speed not exceed: The formula used to calculate braking distance can be derived from a general equation of physics: where Vf is the final velocity, V0 is the initial velocity, a is the rate of deceleration and d is the distance travelled during deceleration. a) hearing If Sam is 40 metres from the cars when the drivers see him, Car 2 will stop just in time. They found that the risk approximately doubled for every 5 km/h above 60 km/h. When played, a CD player reads the CD's information at a constant rate of 1.4 1.4 1.4 megabits per second. inertia Based on the paragraph, which of the following is true? Acceleration ability- you need to be able to accelerate or you can use traction when going uphill For car 1, d = 16.3 metres, while for Car 2, d = 13.9 metres. Look at the large card and try to recall what is on the other side. a) when you first buy the vehicle All of the above, (reaction time, braking time, perception time). c) evasive acceleration Explain the effects of uphill and downhill roadway sections on traveling speed, acceleration ability, and breaking ability. Under normal driving conditions, checks under the hood should be performed how often? Speed is still the most common factor in fatal road accidents, accounting for more than half of all road deaths each year. c) red and green High speed also increases the potential for driver error caused by over- or under-steering (turning the steering wheel too far, thereby cutting the corner, or not far enough, so that the car hits the outside shoulder of the road). a) 90% of all traffic crashes Under most conditions a minimum following interval of _____ will enable you to adjust speed or position appropriately, If a vehicle speed doubles from 20 mph to 40 mph, distance needed to stop the vehicle increases by ____ times. Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Design a circuit to realize the transfer function below using only resistors, capacitors and not more than one OPAMP\mathrm{OP} G(ejH(ej), G(ej)H(ej)G(e^{j})H(e^{j}) Vehicle icing 6. b) brakes Three toy cars, each weighing 0.05 kg, roll down ramps with different heights. c) horn Then click the card to flip it. For speeds below 60 km/h the likelihood of a fatal crash can be expected to be correspondingly reduced. A vehicles speed when going downhill tends to Increase Energy of Motion is another way of expressing Kinetic energy Because of its energy of motion, when a vehicle's speed doubles, the vehicle needs about 4 times the distance to stop The gripping action that keeps a tire from slipping on the roadway is called Friction For which of the following is kinetic energy converted to potential energy? \mathrm{~AMP}OPAMP. Using data from actual road crashes, scientists at the University of Adelaide estimated the relative risk of a car becoming involved in a casualty crasha car crash in which people are killed or hospitalisedfor cars travelling at or above 60 km/h. a) 1 As shown below, every time you double your speed, you multiply your braking distance by four. When a vehicle's speed doubles ( for example, from 20 mph to 40 mph), the distance needed to stop the vehicle increases by 4 times. d) turning, You should always change your oil every 3,000 miles. a. one quarter as much b. one half as much c. twice as much e . When you double the speed of your car, your braking distance quadruples. No matter how nice or well cared for your vehicle is, the best indication of your braking distance will be your speed. Chicken is everyones favorite food. stock ticker When you double your speed from 20 to 40 mph, your vehicle's braking distance will become ____ times longer. metres travelled before brakes are fully applied. When you are towing a trailer with good traction and visibility your following distance should be: ___________ is a coming together or blending of vehicles to maintain a smooth, uninterrupted traffic flow. A patient has secretions in the upper lobe apical segments. Thus, the impact occurs at about 30 kilometres/hour, probably fast enough to kill Sam. d) all of the above are correct, The sequence of traffic lights from top to bottom is: What is the large flat muscle that separates the thoracic cavity from the abdominal cavity? How often should the pre-driving checks identified for approaching the vehicle, outside the vehicle and inside the vehicle be performed? to the front. What position for postural drainage is best? b) 10 mph c) 3 Use these flashcards to help memorize information. Since we know that Vf will be zero when the car has stopped, this equation can be re-written as: From this we can see that braking distance is proportional to the square of the speedwhich means that it increases considerably as speed increases. phonograph At higher speeds cars become more difficult to manoeuvre, a fact partly explained by Newton's First Law of Motion. represents gas at intermediate temperatures (300500 K). G{`%;' R7sr~fvgV!;D%gm7QBl_|ZJ":QBYVua2^NWm1zgnS7GSO}}lu%hgO{lZJDJs.Bqj. 20-30 seconds. Answers. Knowing this information trafficengineers study trafficpatterns and identify where driving errors might occur and determine safe . So we happily let the speedo hover just above the speed limit, unaware that by so doing we are greatly magnifying our chances of crashing. hSmO0+41;*vh+0cI6"M.EX=w motion picture camera Does the cold streaming gas heat up or cool down when it enters the central cloud? a) five sided Each byte consists of exactly 8 bits. When its speed triples? to send you a reset link. a) traffic is traveling in the same direction Four times the distance to stop Because of its energy of motion, when a vehicle's speed doubles, the vehicle needs about: Friction The gripping action that keeps a tire from slipping on the roadway is called what? This states that if the net force acting on an object is zero then the object will either remain at rest or continue to move in a straight line with no change in speed. d) yielding, Alcohol is a ____________ drug. Bridges 3. b) FALSE, Driver error contributes to: a) 9 to 11 a.m. What are 7 signs of a slippery road? b) diamond shaped To allow enough distance to stop in response to threatening objects and conditions, you should identify a plant path of travel _____ seconds ahead. What is the health continuum? Oxidation, the burning of alcohol, takes place in your: Most people experience dips in energy between approximately midnight and 6 a.m., and again between approximately ____________, during which they are more likely to fall asleep while driving. If a car's speed doubles, its kinetic energy increases by 4, if its speed triples then the kinetic energy increases by 9. This resistance of an object to changing its state of rest or motion is called The energy stored in a compressed spring. Using the graph, you estimate the car's kinetic energy at a speed of 50 m/s to be ______ kJ. Car 1 therefore takes 4.5 more metres to stop than Car 2, a 12 per cent increase. Nearly half of all new drivers will either be cited for a traffic offense or be involved in a collision during their first 12 months of driving. If slope and frictional resistance are equal, the factor that has most influence on braking distance is initial speed. Energy of motion is another way is expressing, Because of its energy of motion, when a vehicle's speed doubles, the vehicle needs about, The gripping action that keeps a tire from slipping on roadway is called, If a tire is under-inflated, the only part that grips the road well is the, a bridge roadway freezes before a highway roadway. d) 8, First gear in a vehicle with a manual transmission should be used for speeds up to approximately: b) 2 False the ratio of useful work output to total work input is mechanical advantage (T or F) change the direction of a force and multiply the force a pulley system can moving an object that has kinetic energy must be 3 J a 60-N object moves at 1 m/s. Since the kinetic energy (E) is given by. a) parking lots What occurs when energy is transferred from one object to another? b) a no passing zone Click the card to flip . c) perfect condition vehicle The tailgate of the truck is closed. Tv(s)=100(s+1000)(s+100)(s+10,000)T_{\mathrm{v}}(s)=\pm \frac{100(s+1000)}{(s+100)(s+10,000)}Tv(s)=(s+100)(s+10,000)100(s+1000). Reducing the impact speed from 60 to 50 kilometres/hour almost halves the likelihood of death, but has relatively little influence on the likelihood of injury, which remains close to 100 per cent. The equation for figuring out how far your car will go from the moment you see a hazard to the moment youre completely stopped is: > [thinking distance] + [braking distance] = [total stopping distance]. 2. d) approximately 5 seconds, When planning a long trip, drivers should avoid more than ___________ miles per day. Cars with bull-bars are particularly unfriendly to pedestrians and to other vehicles, since they are designed to protect their own occupants with little regard for others. The force of an impact to a pedestrian knocked down at 60 mph will be .. times as much as when knocked down at 30 mph Four a) steering wheel Adding reaction distance to braking distance, the stopping distance for Car 1 is 27.1 + 16.3 = 43.4 metres. The figure of 1.5 seconds is the reaction time of average drivers. incandescent light a) evasive steering The driver of Car 1, driving just 5 kilometres/hour above the limit, would not be so lucky: whether Sam had lived or died, the driver would face legal proceedings, a possible jail sentence, and a whole lifetime of guilt. Friction causes mechanical energy to be converted to which of these forms? a=6427pcR2Tc3,b=81pcRTc. d) only if something goes wrong, When you are driving you should be able to determine whether you can safely move your vehicle into a space located: a) brake pedal This force creates a problem when a driver change is a vehicles direction to suddenly. The distance your vehicle travels from the time you apply the brake until you stop is, If a vehicle increases its speed from 20 mph to 60 mph, it's braking distance will increase by, speed, weight, and distance between impact and stopping, Any reduction in speed during a collision will, A restraint that provides protection without having to be handled by the occupant is called, Which energy-absorbing feature protects the driver in a front or rear collision, required in all states for children up to a certain age, A properly installed child safety seat is. The kinetic energy of an object changes when which of the following changes? c) 3rd drink Most people experience dips in energy between approximately midnight and 6 a.m., and again between approximately __________, during which they are more likely to fall asleep while driving. A corresponding decrease is to be expected in zones with lower speed limits. Privacy Policy and Doubling your vehicle's speed from 20 to 40 mph will quadruple its braking distance. How often should the pre-driving checks identified for approaching the vehicle, outside the vehicle and inside the vehicle be performed? It quadruples. c) you may not turn left c) visibility Also, it is helpful to determine the values of for which, G(ej)H(ej)G(e^{j})H(e^{j}) left. d) reckless driving, Most states have blood-alcohol concentration limits of _____ percent for drivers under age 21. b) space more similar questions b) merging d) all of the above are correct, Prior to starting the engine, always place your foot on the: a) 2 b) 3 c) 4 d) 8. c) 4. when driving, you control the vehicle with the a) brakes b) steering wheel c) accelerator d) all of the above are correct. a) 30 Just after rain begins a) 2 b) 3 c) 4 d) 8. c) 4. Under most conditions a minimum following interval of how long will enable you to adjust speed or position appropriately? Traveling speed- you must maintain a constant traveling speed to prevent risk while driving uphill or downhill. d) 4, How often should pre-driving checks be identified for approaching the vehicle, outside the vehicle, and inside the vehicle be performed? b) stomach One reason for this increased risk is reaction timethe time it takes between a person perceiving a danger and reacting to it. a) sending information 2 values are the same based on rules of measurement and significant digits. c) idling (b) What net force acted on this car if its mass was 1,000.0 kg? Traction is affected by inertia. c) away from the curb Similarly, the impact your vehicle would have in the case of a collision will also multiply by four. By a half or moreIf the surface is icy, what should you do? Assume that air obeys the Berthelot equation of state: p=RTvbaTv2p=\frac{R T}{v-b}-\frac{a}{T v^2} When a vehicle's speed triples, how much more distance doe sit need to stop? A child on a bicyclelet's call him Samemerges from a driveway just as the two cars are side-by-side. 60 mph: Thinking Distance of 60 feet + Braking Distance of 180 feet = Total Distance of 240 feet, 40 mph: Thinking Distance of 40 feet + Braking Distance of 80 feet = Total Distance of 120 feet, 20 mph: Thinking Distance of 20 feet + Braking Distance of 20 feet = Total Distance of 40 feet. q!o4$%pz n6&5rsEHt00wt I The car increases its speed at a constant rate at as it goes 5.00 times around the track. The line connecting the source to the loads has an impedance of 0.2+j0.10.2+j 0.1 \Omega0.2+j0.1. A and B - The car is at rest for 20 seconds. the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. You will need four times the distance to stop the vehicle as the speed increases! Color indicates gas temperature: Blue and green represent cool gas (100300 K),orange and red represent warm gas (5003000 K), and yellow Reducing the speed to 40 kilometres/hour, as in school zones, reduces the likelihood of death by a factor of 4 compared with 60 kilometres/hour, and of course the likelihood of an impact is also dramatically reduced. b) accelerator pedal What happens when vehicle doubles in speed going from 20 MPH to 40 MPH? Is the risk worth it? If the value of the specific heat csc_{\text {s }}cs of air is 0.1965Btu0.1965\ \text{Btu}0.1965Btu /// lbR\mathrm{lb} \cdot{ }^{\circ} \mathrm{R}lbR at T1=1000F,v1=36.8ft3/lbT_1=1000^{\circ} \mathrm{F}, v_1=36.8\ \mathrm{ft}^3 / \mathrm{lb}T1=1000F,v1=36.8ft3/lb, determine the valuo of cvc_vcv at T2=1000F,v2=0.0555ft3/lbT_2=1000^{\circ} \mathrm{F}, v_2=0.0555\ \mathrm{ft}^3 / \mathrm{lb}T2=1000F,v2=0.0555ft3/lb. The impact speed, as we have seen above, increases rapidly as the travel speed increases, because the brakes are unable to bring the car to a stop in time. B and C - The. Modern cars with low streamlined bonnets are more pedestrian-friendly than upright designs, such as those found in 4-wheel drive vehicles, since the pedestrian is thrown upwards towards the windscreen with a corresponding slowing of the impact. At the highest point, the pendulum is 1.2 m above the ground and has a gravitational potential energy of 62 J. a) to the side 2.) The slope or grade of the roadway is importanta car will stop more quickly if it is going uphill because gravity will help. The muscles of an runner transform chemical potential energy to ________. (c)G(z)H(z)=z1, , (e) G(z)H(z)=1/(z+)(z-), (f) G(z)H(z)=z 3/z(z+1/3), (g) G(z)H(z)=1/z-z-, (h) G(z)H(z)=z-/z(z-2), (i) G(z)H(z)=(s+1)/z. a) green, yellow, red a) time b) 2nd drink In a balanced three-phase system, the source has an abc-phase sequence and is connected in delta. and more. You can cook chicken in the microwave oven. Under most conditions a minimum following interval of how long will enable you to adjust speed or position appropriately? d) 20 mph, On a vehicle with a manual transmission, fourth and fifth gears are generally engaged at speeds over: This piece of information will be important for determining your total stopping distance. endstream endobj startxref What is the mass of the pendulum bob? When you double the speed of your car, your braking distance quadruples. Season it first to help achieve a brown color. 90% of today's drivers believe that they may be at fault if they are involved in a collision. When an energy transformation occurs, which of the following is true? braking distance. 3-4 seconds. d) barbiturate, The effects of alcohol will start with the: Factors that affect traction include tires, shock absorbers, and steering system The sequence of traffic lights from top to bottom is: Many of today's automobiles come equipped with automatic: Vehicle acceleration will produce a weight shift of: When the vehicle is stopped or traveling at a constant speed the suspension load is: First gear in a vehicle with a manual transmission should be used for speeds up to approximately: Regulatory signs that have a red circle with a red slash indicate to you: Prior to starting the engine, always place your foot on the: You should always change your oil every 3,000 miles. If a vehicle's speed doubles, the forces involved in a collision will be quadrupled. It is the tendency of objects to keep moving in a straight line at constant velocity.
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