# Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second?

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1. ## physics

A bus accelerates at 1.4 m/s2 from rest for 10 s. It then travels at constant speed for 26 s, after which it slows to a stop with an acceleration of magnitude 1.4 m/s2. (a) What is the total distance that the bus travels? (b) What was its average velocity?

2. ## Physics

A tennis ball, starting from rest, rolls down a hill. At the end of the hill the ball becomes airborne, leaving at an angle of 35° with respect to the ground. Treat the ball as a thin walled spherical shell (I=2/3 mr^2 )and determine the range x it

3. ## physics

Cars A and B are racing each other along a straight path in following manner: Car A has head start and is a distance dA beyond starting line at t=0. The starting line is at x=o. Car A travels at constant speed vA. Car B starts at starting line but has

4. ## physics

A disc without slipping rolls down a hill height 10.0 m. If the disc starts from rest at the top of hill, what is its speed at the bottom?

5. ## Physics-1

A child sleds down a snow covered hill with a uniform acceleration. The slope of the hill is 38.5 m long. If the child starts at rest and reaches the bottom of the hill in 5.5 s, what is the child's final speed?

6. ## Science

Starting from rest, an object rolls down a long ramp with a constant acceleration of 1.72 m/s2. After rolling for 4.75 s, what is the magnitude of the ball’s final velocity? A. 9.81 m/s B. 8.17 m/s C. 6.30 m/s D. 4.09 m/s

7. ## physics

A 873-kg (1930-lb) dragster, starting from rest completes a 403.6-m (0.2523-mile) run in 4.935 s. If the car had a constant acceleration, what would be its acceleration and final velocity?

8. ## Physics

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

9. ## physics

2. A baseball starts from rest and rolls 50.0 m down a hill in 10.0 seconds. What is the acceleration?

10. ## physics

The cart starts from rest at the top of a hill with height, H1. It rolls down the hill and at the bottom of the hill it has a speed of 8 m/s. Next it is at the top of same hill but pushed so that it starts at the top of the hill with a speed of 6 m/s. How

11. ## physics

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 170 m during the second 5.5 s of its motion. How far did it roll during the first 5.5 s of motion? Express your answer using two significant figures. x= m

12. ## Science

An automobile starting from rest at t0 = 0 at x0 = 0 undergoes constant acceleration in a straight line. It is observed to pass two marks separated by 64 m, the first at t = 8s and the second at t = 12s. What is the value of the acceleration?

13. ## physics

the coefficient of starting friction for wood on wood is 0.55. What is the force of friction of a wood block of mass 3.5 kg being pulled on a wood floor? i think i use the formula F=mMA where F is the force needed to move a solid from rest, m=coefficient

14. ## PHYSICS

An 800.0 kg roller coaster car is at rest at the top of a 95 m hill. It rolls down the first drop to a height of 31 m. When it travels to the top of the second hill, it is moving at 28 m/s. It then rolls down the second hill until it is at ground level.

15. ## physics

A 50.0-kg skier starting from rest travels 200 m down a hill that has a 20.0° slope. When the skier reaches the bottom of the hill, her speed is 30.0 m/s. (a) How much work is done by friction as the skier comes down the hill? (b) What is the magnitude of

16. ## Physics

Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 3.83 m/s. Ignore frictional losses. (a) What is the height of the hill? I've tried to use the mgh=1/2mv^2. I think it's because it's

17. ## college physics

A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s,

18. ## dynamics

12. A car travels around a horizontal circular track of radius 45m.If the car increases its speed at a constant rate of 1.2m/s2 starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s2. What is its speed at this instant?

19. ## Dynamics

A car travels around a horizontal circular track of radius 45m.If the car increases its speed at a constant rate of 1.2m/s2 starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s2. What is its speed at this instant?

20. ## physics college

An antelope moving with constant acceleration covers the distance between two points 70.0 m apart in 7.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first point? (b) What is its acceleration? A car is stopped at a

21. ## Physics

I need help with this question...A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 8.90 m/s. (a) Determine the magnitude of her acceleration, assumed to be constanIf the ramp is inclined

22. ## physics

1. A football player initially at rest accelerates uniformly as she runs down the ﬁeld, travelling 17 m [E] in 3.8 s. What is her ﬁnal velocity? 2. A child on a toboggan sits at rest on the top of a tobogganing hill. If the child travels 70.0 m

23. ## Physics

Car travels up hill at a constant speed of 50 km/h and returns down the hill at a constant speed of 65 km/h. Calculate the avg speed for the round trip in km/h.

24. ## Science

Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second? How fast is it moving at the end of

25. ## physics

An electron, starting from rest and moving with a constant acceleration, travels 4.7 cm in 5.2 ms. What is the magnitude of this acceleration? Answer in units of km/s2

26. ## physics

According to recent test data, an automobile travels 0.250 mi in 19.9 s, starting from rest. The same car, when braking from 60.0 mi/h on dry pavement, stops in 146 ft. Assume constant acceleration in each part of the motion, but not necessarily the same

27. ## Physics

A tennis ball, starting from rest at a height h = 2.10 m, rolls down the hill. At the end of the hill the ball becomes airborne, leaving at an angle of 27.0° with respect to the ground. Treat the ball as a thin-walled spherical shell (I = ⅔mr²), and

28. ## physics

A skateboarder, starting from rest, rolls down a 13.9-m ramp. When she arrives at the bottom of the ramp her speed is 6.06 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 33.2 ° with respect to

29. ## physics

A ball initially at rest rolls down a hill with an acceleration of 2.7 m/s2. If it accelerates for 8.1 s, how far will it move? Answer in units of m.

30. ## physics

A 75 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.6 m/s in 1.1 s. It travels with this constant speed for the next 7.2 s, undergoes a uniform negative acceleration for 2.4 s, and

31. ## physics

A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.76 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s,

32. ## physics

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 200m during the second 4.8s of its motion. How far did it travel the first 4.8 seconds

33. ## Physics 1

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 150 m during the second 5.0 s of its motion. How far did it roll during the first 5.0 s of motion?

34. ## physics

In Example 5.8, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0 kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80 s. It travels with

35. ## physics

1.what is the final velocity of a hoop that rolls with out slipping down a 3.00m high hill starting at rest? 2. a 1.80 m radius playground merry go round (disk = 1/2 m r^2) hass a mass of 120 kg and is rotating with an angular velocity of .600 rev/s. what

36. ## physics

Cars A and B are racing each other along a straight path in following manner: Car A has head start and is a distance dA beyond starting line at t=0. The starting line is at x=o. Car A travels at constant speed vA. Car B starts at starting line but has

37. ## physics

A large boulder sits at the top edge of a cliff, this is boulder A. A smaller boulder sits on a ledge half way down the same cliff, this is boulder B. Which boulder has the greatest potential energy, A or B?

38. ## physics

Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance Da beyond the starting line at t=0. The starting line is at x=0. Car A travels at a constant speed Va. Car B starts at the

A particle travelling in a straight line with constant acceleration and starting from rest covers 36m in the 5th second.Find the acceleration and the distance traveled in the 6th second

40. ## Physics

A 91 kg man stands on a spring scale in an elevator. Starting from rest, the eleva- tor ascends, attaining its maximum speed of 1.7 m/s in 1.07 s. It travels with this constant speed for the next 5 s, undergoes a uniform negative acceleration for 1.67 s,

41. ## physics

A bus accelerates at 2.4 m/s2 from rest for 10 s. It then travels at constant speed for 25 s, after which it slows to a stop with an acceleration of magnitude 1.5 m/s2. (a) What is the total distance that the bus travels? (b) What was its average velocity?

42. ## physics

A cart on a horizontal, linear track has a fan attached to it. The cart is positioned at one end of the track, and the fan is turned on. Starting from rest, the cart takes 4.22 s to travel a distance of 1.44 m. The mass of the cart plus fan is 350 g.

43. ## physics

Kathy Kool buys a sports car that can accelerate at the rate of 5.00 m/s2. She decides to test the car by racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.00 s before Kathy. Stan moves with a

44. ## algebra

. A boy is sitting in his red wagon at the top of a hill, holding onto a tree to keep from rolling down the hill. The distance from the top of the hill to the bottom is 41 meters. He pushes off from the tree at a starting velocity of 2 m/s, and then

45. ## physics

4. An 800.0 kg roller coaster car is at rest at the top of a 95 m hill. It rolls down the first drop to a height of 31 m. When it travels to the top of the second hill, it is moving at 28 m/s. It then rolls down the second hill until it is at ground

46. ## Physics

Alex is exploring a cave that has a slight incline and is iced over, forcing her to use ice cleats to explore it. After climbing 50 m into the cave, she finds what she is looking for and she takes out her ice pick and hammer to begin removing the stones.

47. ## psychics

1. (a) A frictionless car of mass 1.5 tonnes travels uphill along a slope at 20º to the horizontal for 0.5 km at 20 km per hour. (i) How much work does the engine do on the car? (ii) What power does the engine supply? (b) The car the rolls back down the

48. ## Physics

An electron, starting from rest and moving with a constant acceleration, travels 5.5 cm in 10 ms. What is the magnitude of this acceleration? Answer in units of km/s

49. ## physics

An electron, starting from rest and moving with a constant acceleration, travels 5.8 cm in 14 ms. What is the magnitude of this acceleration? Answer in units of km/s2

50. ## Physics

What is the final velocity of a hoop that rolls without slipping down a 5.00-m-high hill, starting from rest?

51. ## Physics

A ball rolls down a hill with a constant acceleration of 2.0 m/s2. If the ball starts from rest, (a) what is its velocity and the end of 4.0 s? (b) How far did the ball move?

52. ## physics

A ball rolls along flat ground at 7.0 m/s then encounters a hill. If the ball rolls 15 m up the hill before coming to a stop, what was the acceleration (in m/s2) experienced by the ball as it rolled up the hill?

53. ## Physics

A skateboarder, starting from rest, rolls down a 12.5-m ramp. When she arrives at the bottom of the ramp her speed is 6.45 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.

54. ## physics

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 8.00 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.

55. ## physics

A skateboarder, starting from rest, rolls down a 13.4-m ramp. When she arrives at the bottom of the ramp her speed is 6.14 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 32.6 ° with respect to

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to

57. ## physics!!

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to

58. ## Physics

A 58.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.55 m/s in 1.25 s. It travels with this constant speed for the next 8.00 s. The elevator then slows down (undergoes a uniform

59. ## physics

A ball initially at rest rolls down a hill with an acceleration of 4.5 m/s2. If it accelerates for 7.9 s, how far will it move? Answer in units of m

60. ## physics

according to recent typical test data, a Ford Focus travels 0.23 mi in 19 seconds, starting from rest. The same car, when braking from 59.0mph on dry pavement, stops in 141 ft. Assume constant acceleration in each part of its motion, but not necessarily

61. ## physics

A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)

62. ## physics

A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)

63. ## physics

7. A 2000.0 kg boulder sits on the top of a 50.0 m cliff. As the boulder rolls off, it loses 3.0% of its mechanical energy as heat. How much heat energy goes the boulder lose? How much mechanical energy does the boulder have right before hits the ground?

64. ## Physics

A)A 100kg person is riding a 10kg bicycle up a 25degree hill. The hill is long and the coefficient of static friction is 0.9. How much force does the person have to apply in order for her to ride 10m up the hill at constant velocity? B) If the person now

65. ## Physics

A hollow sphere starts from rest and rolls down a hill without sliding. At the bottom of the hill, it has a linear velocity of 5 m/s. What was the height of the hill the sphere rolled down (in meters)?

66. ## Physics

A 46.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.85 m/s in 1.07 s. It travels with this constant speed for the next 6.80 s. The elevator then slows down (undergoes a uniform

67. ## Physics

A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation

68. ## physics rewrite

starting from rest, a ball rolls, down an incline at a constant acceleration of 2meters per second squared what is the velocity of the ball after 8.5 seconds? how far does the ball roll in 10 seconds? any one can help pleasse im stuck show n detail how to

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 170 m during the second 5.5 s of its motion How far did it roll during the first 5.5 s of motion? x=

70. ## Physics

ball starts from rest under constant acceleration. If it travels a distance of 20.0 cm after time t, how far from the starting point is it after time 2t? Answer 40.0 cm. 60.0 cm. 80.0 cm. 100.0 cm. More information is needed to answer this question.

71. ## Physics

A 0.525 ball starts from rest and rolls down a hill with uniform acceleration, traveling 154 during the second 10.0 of its motion. How far did it roll during the first 4.00 of motion?

72. ## physics

In Example 5.8 in the text book, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0 kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80

73. ## physics

The cart starts from rest at the top of a hill with height, H2. It rolls down the hill and at the bottom of the hill it has a speed of 10 m/s. Next it is at the top of same hill but pushed so that it starts at the top of the hill with a speed of 4.59 m/s.

74. ## Physics

what does it mean to have a constant acceleration does that mean that a= 0 or a=x? I particularly need help with::::>> Suppose the pilot, starting again from rest, opens the throttle only partway. At a constant acceleration, the airboat then covers a

75. ## math

a car travels around a horizontal circular track of radius 45m. if the car increases its speed at a constant rate of 1.2m/s starting from rest, determine the time needed for it to reach an acceleration of 1.4m/s. What is its speed at this instant?

76. ## Physics

A 5 kg ball is initially at rest at the top of a hill 10m high. If it rolls down the hill (converting all of its potential energy to kinetic energy,) what is the maximum kinetic energy it could have at the bottom of the hill? -I am not sure what formula to

77. ## physics

A 1400kg car starts at rest and rolls down a hill from a height of 12m. (a) how much kinetic energy does the car have at the bottom of the hill?(b) how fast is the car going at the bottom of the hill? Can someone explain how to do it!

78. ## physics

. A ball, initially at rest at t= 0 seconds, rolls with constant acceleration down an inclined plane 10 meters long. If the ball rolls 1 meter in the first 2 seconds, how far will it have rolled at t= 4 seconds?

79. ## physics

What are the speed and acceleration (increase/decrease or remain constant) of a ball rolling down a a) straight hill, b) concave hill c) convex hill Can someone explain why they are, not just the answers?

80. ## Math

After a boulder is pushed down a hill, its speed s(t) at time t is given by the formula s(t)=v+at, where v is the initial velocity and a is the acceleration. If s(2)=16 and s(5)=25, find the initial velocity and acceleration.(round to the nearest tenth)

81. ## science

a bike weighs 200 n. if it starts from rest and travels 100 m in 5 s undergoing constant acceleration, what net force is causing the acceleration

82. ## Physics

At t=0 car A and truck B are 350 m apart on a straight road. Starting from rest car A speeds up with a constant acceleration of 10 m/s^2. Truck B is travelling in the opposite direction with a constant speed of 15 m/s. How far away is car A from its

83. ## Physics

7. A formula 1 racecar is capable of very quick starts (with a launch control system, that prevents the wheels from spinning during rapid acceleration)). A 2011 Ferrari (driven by none other than Agent 001) is initially at rest, and undergoes a constant

84. ## 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

85. ## Physics

Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from

86. ## math

Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from

87. ## Physics

Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from

88. ## Physics

A 44.0 kg man stands on a bathroom scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.90 m/s in 1.19 s. It travels with this constant speed in the upward direction for the next 7.60 s. The elevator then slows

89. ## Physics

Both start from rest, but experienced Stan leaves the starting line 1.00 s before Kathy. Assume Stan moves with a constant acceleration of 3.45 m/s2 and Kathy maintains an acceleration of 5.10 m/s2. (a) Find the time it takes Kathy to overtake Stan. (b)

90. ## physics

A 1,600 kg car coasts down a hill starting from rest and decreases its height by 22 m over a distance of 90 m of travel. How fast will it be going at the end of the hill, if friction has no effect in slowing its motion?

91. ## physics

A man skis down from the top of a hill 1500.0 m high, starting from rest. If he loses 50% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?

92. ## physics

A 873-kg (1930-lb) dragster, starting from rest completes a 403.7-m (0.2523-mile) run in 4.920 s. If the car had a constant acceleration, what would be its acceleration and final velocity?

93. ## physics

Two objects moving with constant acceleration starting from rest are to cover the same distance. If the second is to cover that distance in ¼ of the time would need a: a quarter of the first’s acceleration. b: a half of the first’s acceleration. c:

94. ## physics

A car travels up a hill at a constant speed of 45 km/h and returns down the hill at a constant speed of 70 km/h. Calculate the average speed for the round trip.

95. ## Physics

A car travels up a hill at a constant speed of 33 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the average speed (in km/h) for the round trip.

96. ## science/math

A car travels up a hill at a constant speed of 45 km/h and returns down the hill at a constant speed of 70 km/h. Calculate the average speed for the round trip.

97. ## physics

A car travels up a hill at a constant speed of 45 km/h and returns down the hill at a constant speed of 70 km/h. Calculate the average speed for the round trip.

98. ## physics

A car travels up a hill at a constant speed of 45 km/h and returns down the hill at a constant speed of 70 km/h. Calculate the average speed for the round trip.

99. ## Physics 11

A 1200Kg car travels at a constant speed of 26m/s for 5s up a 130m long hill. The total height of the hill is 27m & the friction force acting on the car is 2520N. What power was used by the car in traveling up the hill? I know that Fnet=o bc velocity is

100. ## Physics

A package of dishes (mass 50.0 kg) sits on the flatbed of a pickup truck with an open tailgate. The coefficient of static friction between the package and the truck's flatbed is 0.330, and the coefficient of kinetic friction is 0.230. (a) The truck