The brakes on a parked car fall and it accelerates at a constant rate, rolling into a lamp post down the hill. the car reaches a velocity of 4.3m/s by the time it smashes into the lamp post. The time

52,167 results
  1. Physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.6 m/s2 for 4.5 seconds. It then continues at a constant speed for 7.3 seconds, before applying the

  2. Physics

    A car accelerates in the +x direction from rest with a constant acceleration of a1 = 1.76 m/s2 for t1 = 20 s. At that point the driver notices a tree limb that has fallen on the road and brakes hard for t2 = 5 s with a constant acceleration of a2 = -5.93

  3. dynamics

    a motorcycle traffic police starts from rest at point A two seconds after a car speeding at the constant rate of 120 km/h passes point A (where speed limit is 100 km/h only) if the policeman accelerates at the rate of 6 m/s^2 until he reaches the speed of

  4. physics

    A car and driver weighing 7750 N passes a sign stating “Bridge Out 28.5 m Ahead.” She slams on the brakes, and the car decelerates at a constant rate of 10.6 m/s2 . The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the work done

  5. Physics. PLEASE HELP!!

    A small car of mass 985 kg is parked behind a small truck of mass 1551 kg on a level road. The brakes of both the car and the truck are off so that they are free to roll with negligible friction. A 83 kg woman sitting on the tailgate of the truck shoves

  6. physics

    A 1000 kg car traveling is at 40.0 m/ s. To avoid hitting a second car the driver slams on his brakes. The brakes provide a constant friction force of 8000 N. ( a) Find the minimum distance that the brakes should be applied in order to avoid a collision

  7. physics

    A car weighing 1.0 x 10^4N is parked on a 34 degree slope. The brakes fail and the car starts to slide down the hill. Assume no friction. Show your work, and determine a) the acceleration of the car, and b) after it has moved 28.0 m, how fast is it moving?

  8. physics

    A car is parked near a cliff overlooking the ocean on an incline that makes an angle of 21.7◦ with the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline and has a

  9. physics

    A car of mass 1200 kg starts from rest, accelerates uniformly to a speed of 4.0 m/s in 2.0 s and continues moving at this constant speed in a horizontal straight line for an additional 10 s. The brakes are then applied and the car is brought to rest in 4.0

  10. physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.6 m/s2 for 4.4 seconds. It then continues at a constant speed for 8.5 seconds, before applying the

  11. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 20.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  12. Physics

    A car's initial velocity of 13.5 m/s accelerates at a rate of 1.9 m/s^2 for 6.2 s. Then, it accelerates at a rate of -1.2 m/s^2 until it stops. 1) What is the car's maximum speed? 2) What is the total time from the start of the first acceleration until the

  13. science

    a car of mass 1360 kg descends from a hill of height 86 m at a constant speed of 20 km/h. assuming that all the potential/kinetic energy of the car goes into heat in the brakes, find the rise in temperature of the brakes (use the heat capacity (C) of the

  14. physics

    A car is parked near a cliff overlooking the ocean on an incline that makes an angle of 29.1◦ with the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline and has a

  15. physics

    Question: You live at the top of a steep (a slope of ???? degrees above the horizontal) hill and must park your 2200 kg car on the street at night. a) You unwisely leave your car out of gear one night and your handbrake fails. Assuming no significant

  16. Physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  17. Physics

    A car parked on a hill. The driver starts the car, accelerates until the car is driving at constant speed, drives at constant speed, then brakes to put the brake pad in contact with the spinning wheels. How is static friction, sliding friction, rolling

  18. physics

    a 3000 pound car is parked on a hill at an angle of elevation of 16 degrees. how much force must the brakes exert to keep the car from rolling down the hill?

  19. physics

    Q: Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.7 m/s2 for 3.2 seconds. It then continues at a constant speed for 8.8 seconds, before applying the

  20. Physics 12

    A sports car is travelling along a highway at a constant velocity of 36 m/s [N] exceeding the speed limit. It passes an unmarked police car parked on the shoulder of the highway. The police car accelerates from rest, 3.0 s after the sports car passed it,

  21. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24 degrees below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  22. Math

    A car is parked in a car-park from 07 45 to 16 30 on the same day. Find: a. the total time for which the car is parked b. the parking fee if the rate of charges is $2.50 for the first hour and 80 cents for each half hour or a part of a half hour thereof.

  23. physics

    a stunt car driver testing the use of air bags drives a car at a constant speed of 25m/s for a total of 100 meters. he applies his brakes and accelerates uniformlu to a stop just as he reaches the wall 50 meters away. SKETCH THE A GRAPH SHOWING POSITION

  24. Physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.5 m/s2 for 3.6 seconds. It then continues at a constant speed for 10.1 seconds, before applying the

  25. Physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.8 m/s2 for 4.5 seconds. It then continues at a constant speed for 9.9 seconds, before applying the

  26. physics

    A 1,660 kg car is parked on a hill with a slope of 8.0°. Its brakes and transmission are locked in position to keep the car from rolling. The coefficient of static friction of the rubber tires on the asphalt road is 0.14. What is the force of static

  27. physics

    A speeder doing 50.0 mi/hr (about 22 m/s) in a 25 mi/hr zone approaches a parked police car. The instant the speeder passes the police car, the police begin their pursuit. If the speeder maintains a constant velocity, and the police car accelerates with a

  28. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 25.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  29. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 23.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  30. Science

    Physics question -A driver of a car travelling at 72km/h, applying brakes and accelerates uniformly in opposite direction at the rate of 5m/s2. How long will the car take to come into rest ? How far will the car covered a distance after applying bra

  31. physics

    A 0.0820 kg pair of fuzzy dice is attached to the rearview mirror of a car by a short string. The car accelerates at a constant rate, and the fuzzy dice hang at an angle due to the car's acceleration. If the dice hang at 10.5° from the vertical as the car

  32. Physics

    Let your car have a mass of 825 kg. Your car is moving at a speed of 3.08 m/s when it strikes a parked car and stops in 0.21 s. What force did the parked car exert on it to stop it that quickly?

  33. physics

    a car accelerates from rest at a constant rate alpha for some time, after which it decelerates at a constant rate beeta and comes to rest. if the total time elapsed is t, the maximum velocity acquired by the car will be?

  34. physics

    Unit 2: Kinematics in 1-D Exam Preparation 1. A bike first accelerates from 0.0 m/s to 5.0m/s in4.5 s, then continues at this constant speed for another 4.5 s What is the total distance traveled by the bike? A car traveling at 20 m/s when the driver sees a

  35. Physics

    A car starts from rest and accelerates at a rate of 5.75 m/s/s for a time (t1) of 6.76 seconds. The car then maintains a constant speed for a time of 7.32 seconds (t2 minus t1). Finally, the car slows down at a rate of -4.21 m/s/s.

  36. College Physics

    A car moving at constant velocity of 14 m/s passes a gasoline station. two seconds later, another car leaves the gasoline station and accelerates at the constant rate of 2m/s^2. How soon will the second car overtake the first?

  37. physics

    a car starts from rest and accelerates at in a straight line at a constant rate of 4.5m/s/s. How far will the car travel in 35 seconds.

  38. physics

    You live at the top of a steep (a slope of ???? degrees above the horizontal) hill and must park your 2200 kg car on the street at night. a) You unwisely leave your car out of gear one night and your handbrake fails. Assuming no significant frictional

  39. Mechanics NYA

    Assume you are driving a car at a constant speed of 75.0 km/h. Suddenly you see a deer standing on the highway and you must put on the brakes. Your reaction time (time elapsed between the moment you see the deer and your foot hitting the brakes) is 0.116

  40. physics

    a speeder is going at a constant speed of 20m/s when a police car accelerates from rest at a rate of 4.5,/ssquared to catch them. How long did it take for the officer to reach the speeding car?

  41. physics

    A driver of a 7100 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

  42. PHYSICS

    A driver of a 7400 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

  43. Alam

    a car accelerates from rest at a constant rate x for some time after which it decelaretes at a constant rate y to come to rest .if the total time elapsed is t the total distance travlled by the car is given by what ?

  44. Physics

    The brakes on a parked car fall and it accelerates at a constant rate, rolling into a lamp post down the hill. the car reaches a velocity of 4.3m/s by the time it smashes into the lamp post. The time between the brakes failing and the smashing of the car

  45. Physics

    A drunken driver crashes his car into a parked car that has its brakes set. The two cars move off together (perfectly inelastic collision), with the locked wheels of the parked car leaving skid marks 6.0 m in length. If the mass of the moving car is 2130kg

  46. physics

    please somebdy help me solveing this. Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.3 m/s2 for 3.3 seconds. It then continues at a constant speed

  47. physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.5 m/s2 for 4.9 seconds. It then continues at a constant speed for 6.7 seconds, before applying the

  48. Physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5 m/s2 for 4.2 seconds. It then continues at a constant speed for 11.1 seconds, before applying the

  49. physics with 6 questions

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.3 m/s2 for 3.9 seconds. It then continues at a constant speed for 13.7 seconds, before applying the

  50. physics

    A car is moving at 20 m / s before it applies the brakes for 4 s. It slows at a constant rate to 10 m / s. Five seconds after this, the brakes are applied again and stop the car in 5 seconds. The car slows at a constant rate during this period of time as

  51. Physics

    A car starts from rest and accelerates at a rate of 1 m/s^2 until it reaches a velocity of 7 m/s. It then travels at a constant velocity for the next 15 seconds. The driver then applies the brake, bringing the car to stop. The brakes provide an

  52. physics

    A student driving at a constant speed of 45 m/sec passes a highway patrol car parked on the side of the road. One second later, the patrol car accelerates at a constant rate of 3.00 m/sec^2 in an attempt to catch up with the speeding student. How long does

  53. Physics

    Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3 m/s2 for 3.6 seconds. It then continues at a constant speed for 11.7 seconds, before applying the

  54. physics

    A car starts from rest and accelerates uniformaly at the rate of 0.98m/s in 1hr.what is its final velocity? A car starts from rest and reaches a velocity of 40m/s in 1minutes..(a)what is its acceleration?(b) If its acceleration remains constant,what will

  55. Physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  56. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  57. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  58. Physics

    This has been posted before but I need someone to elaborate please. A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes

  59. physics

    A car and a motorcycle start from rest at the same time on a straight section of the road. However, the motorcycle starts 29.6 m behind the car. The car accelerates at a uniform rate of 3.9 m/s^2 while the motorcycle accelerates at a constant rate of 4.2

  60. physics

    A car is moving at 25.0m/s on a straight highway lane. 10.0m in front of the car is a van that is travelling with the same speed. The van’s driver suddenly hits the brakes to avoid an obstruction, slowing down at a rate of 9.00m/s². The car’s driver

  61. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  62. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  63. troy

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  64. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 25.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  65. Physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 20.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  66. physics

    015 (part 1 of 2) 10.0 points A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21 below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest

  67. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  68. physics

    A car initially going 30ft/sec brakes at a constant rate (constant negative acceleration) coming to a stop in 4 seconds. How far did the car travel?

  69. Physics for life science

    1. A car starts from rest and accelerates at a constant rate to 80km/h in 6s in positive direction. What is the acceleration? 2. After how long will the car speed be 120km/h if it keep accelerating at the same rate as in 1.? 3.After the car reached speed

  70. AP Physics

    1. A car is traveling down the road at a constant speed of 11 km/h. At time zero it is forced to stop. The driver slams on the brakes and the car travels 18 m as it uniformly accelerates, coming to a stop. The car remains at rest for 5.0 seconds. Then the

  71. physics

    A car is parked on a cliff overlooking the ocean on an incline that make an angel of 37 degree with the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. the car rolls from rest down the incline with a

  72. Physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 22◦ below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a

  73. Physics

    A car starts from rest and accelerates at a constant rate of 1.1 m/s2. If the radius of the car wheels is 29 cm, and the final angular speed of the car wheel is 48 rad/s, how far does the car travel

  74. math

    six cars are parked in front of a car dealership. If you are looking at the cars from the front. the red car is parked in front of the green car. the black car is between the green and the yellow car. The blue car is parked on the right side of the red

  75. science

    To stop an elevator in free fall, brakes are installed between the walls of the elevator car and the walls of the shaft in which the car moves. In addition, springs with compression coils are installed on the floor, at the bottom of the shaft, in order to

  76. Physics

    The 2500 kg cable car shown in the figure below descends a 200 m high hill. In addition to its brakes, the cable car controls its speed by pulling an 1200 kg counterweight up the other side of the hill. The rolling friction of both the cable car and the

  77. physics

    a car of mass 1000 kg moving at a speed of 20 m/s is brought to rest through a distance of 100 m by applying the brakes.a)calculate the accleration of the car.b) calculate the force by the brakes assuming that is constant and there is no other

  78. Physics

    A car speeds, at a constant 16 m/s, past a parked police motorcycle. Five seconds later, the police officer leaves on her motorcycle, and accelerates at 2 m/s2. How many seconds until she catches the car?

  79. physics

    A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 36 below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are defective. The car rolls from rest down the incline with a constant

  80. calc

    a) A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 40 ft/s^2. What is the distance covered before the car comes to a stop? b) A car braked with a constant deceleration of 40 ft/s^2 and produced skid

  81. Physics

    A car slams on its brakes. When it slammed on its brakes, it was decelerating at 6 m per sec per sec. How high would the car have to fall from to have the same force?

  82. Physics

    A car and driver weighing 7740 N passes a sign stating “Bridge Out 27.7 m Ahead.” She slams on the brakes, and the car decelerates at a constant rate of 12.3 m/s^2. The acceleration of gravity is 9.8 m/s^2. What is the magnitude of the work done

  83. Physics

    A vacant, 1560 kg car begins from rest and rolls 46 meters down an inclined plateau before rolling off the edge and crashing into the sea below. The plateau is at a constant downward angle of 12.4 degrees with the horizontal. The coefficient of rolling

  84. Physics

    Problem 4- Speedy car, driving at 30 m/s. The driver suddenly observes a slow-moving van 155 m ahead traveling at 5 m/s in the same direction. The driver of the car immediately applies the brakes causing a constant acceleration of 2 m/s2 in a direction

  85. Physics

    A car is going 18.3 m/s down a road. At time t=0s, a squirrel runs in front of the car 36 meters away. It takes the driver t=0.67s to slam on the brakes, but after that , the brakes offer a frictional force F(fr)=21000N. Her car masses at 1860 kg. a) How

  86. physics

    A railroad car rolling along by itself is passing by a grain elevator, which is dumping grain into it at a constant rate. (a) Does momentum conservation imply that the railroad car should be slowing down as it passes the grain elevator? Assume that the

  87. college Physics

    A car is traveling at 7.0 m/s when the driver applies the brakes. the car move 1.5m before it comes toa complete stop. if the car had been moving at 14m/s how far would it have continued to move after the brakes were applied? assume the braking force is

  88. physics

    A car accelerates from rest at a constant rate of 2.2 m/s2 for 6.9 s. How far does the car travel in this time?

  89. PHYSICS

    A 970kg car is at the top of a 38m -long, 2.5 ∘ incline. Its parking brake fails and it starts rolling down the hill. Halfway down, it strikes and sticks to a 1280kg parked car. Ignoring friction, what's the speed of the joined cars at the bottom of the

  90. Physics

    A car is initially travelling at a constant speed of 20 m/s along a highway. Suddenly, the driver applies the brakes, causing the car to accelerate at -5.0 m/s^2. If the driver applied the brakes 0.50s late, determine the distance the car travels from the

  91. physics

    A car is traveling at a constant velocity of 21 m/s (about 45 mph). The driver sees a fallen tree lying across the road and hits the brakes after a delay (reaction time) of 245 ms. (1 ms = 10-3 s.) Calculate the distance the car travels during this 245 ms

  92. physics

    A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

  93. physics

    A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

  94. physics

    A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume

  95. Physics

    A truck traveling at a constant speed of 40.0 km/h applies its brakes and comes to a complete stop in 5.0 s. The truck starts again and accelerates at a constant rate of 0.80 m/s2. After restarting, how far does the truck travel before reaching its

  96. Physics

    A driver of a car going 95 km/h suddenly sees the lights of a barrier ahead. It takes the driver 0.55 s before he applies the brakes (this is known as reaction time). Once he does begin to brake, he accelerates at a rate of -10.0 m/s²

  97. Calculus

    A car traveling 132 feet per second decelerates at a constant rate to 60 feet per second in three seconds. A. what is the negative acceleration? B. How long after the brakes are first applied will it take to come to a complete stop? C. How far does it

  98. Physics

    A car starts from rest and accelerates at a rate of 5.75 m/s/s for a time (t1) of 6.76 seconds. The car then maintains a constant speed for a time of 7.32 seconds (t2 minus t1). Finally, the car slows down at a rate of -4.21 m/s/s. Determine the total

  99. physics

    A red car with a 70kW engine and a mass of 1335kg accelerates at full power for 2s from rest along a level stretch of road heading east before going down a 3m high hill. The driver puts the car in neutral to accelerate as they coast down the hill. Some

  100. Quadratic Functions3

    The distance a car will skid after its brakes lock can be modelled by the equation d=kv^2, where d is the stopping distance in metres, k is a constant based on road conditions and v is the velocity of the car in metres per second at the moment the brakes

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