# A 62-kg boy on a 1.50-kg skateboard moving at +1.2 m/s steps off and lands on the sidewalk with a velocity of +1.1 m/s. How fast is the skateboard moving?

19,246 results
1. ## Sat math

Brian and Richard stand back-t0-back. Each boy takes 5 equally spaced steps, in opposite directions from the starting location. At this point, Richard walks to where Brian is in 9 steps. How many times bigger are Richard's steps than Brian's steps? A. 4/5

2. ## physics

A boy jumps from a wall 3m high. What is an estimate of the change in momentum of the boy when he lands without rebounding? the answer is 5x10^2kg/ms, but how?

3. ## science

A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after

4. ## Physics

A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after

5. ## Physics (Biomechanics)

Scott is rolling down a 30° slope on his skateboard.The total mass of Scott and the skateboard is 75 kg. The rolling friction between the skateboard wheels and the concrete is 9 N acting backward against the skateboard. The drag force due to air

6. ## Physics

A 1.40 kg skateboard is coasting along the pavement at a speed of 5.5 m/s when a 0.800 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination.

7. ## Physics

A 42.5 kg student runs down the sidewalk and jumps with a horizontal speed of 4.16 m/s onto a stationary skateboard. The student and skateboard move down the sidewalk with a speed of 3.97 m/s. a) Find the mass of the skateboard.

8. ## its physics.. i just want the formula

A boy on a 2.2 kg skateboard initially at rest tosses a(n) 7.7 kg jug of water in the forward direction. If the jug has a speed of 2.9 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.57 m/s, find the boy’s mass.

9. ## physics

You push a skateboard so that it rolls down the road at a speed of 1.30 m/s. You run after the skateboard and jump off the ground with speed 3.80 m/s and an angle of 22.0° above the horizontal hoping to land on the skateboard. How much distance do you

10. ## science

check answers 1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done? A. 0.040 j B.9 j C.14 j (I PICK THIS) D.25 j 2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the

11. ## math

1. A box of cleaning supplies weighs 15 N. If the box is lifted a distance of 0.60 m, how much work is done? (1 point) 0.040 J 9 J 14 J 25 J 2. To chop wood, you apply 50.0 N of force to an ax. The ax applies 600.0 N of force to the wood. What is the

12. ## physics

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 89.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick

13. ## Physics

A 1.25 kg skateboard is coasting along the pavement at a speed of 5.04 m/s when a 0.640 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination? Answer in units of m/s Your answer must be within

14. ## mathematics

You are buying a new skateboard that costs \$98. Percent of sales tax is 6%. What is the total cost of the skateboard?

15. ## Physics

A 38.0-kg boy, riding a 2.37-kg skateboard at a velocity of +5.07 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.06 m/s, 10.35° above the

16. ## Physics

*62. A 40.0-kg boy, riding a 2.50-kg skateboard at a velocity of +5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.50° above the

17. ## College physics 1

A 40.0-kg boy, riding a 2.50-kg skateboard at a velocity of +5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.50o above the

18. ## Physics

A 10 m long frictionless ramp is inclined at an angle of 30 degress to the horizontal. A boy of mass 57 kg coasts down the incline on a skateboard of mass 3.0 kg. The acceleration due to gravity may be taken as 9.8 m/s^2 and the effects of air resistance

19. ## Physics

You push a skateboard so that it rolls down the road at a speed of 0.600 m/s. You run after the skateboard at a speed of 3.50 m/s and while still behind the skateboard you jump off the ground at an angle of 22.0° above the horizontal hoping to land on the

20. ## physics

You push a skateboard so that it rolls down the road at a speed of 1.40 m/s. You run after the skateboard at a speed of 3.80 m/s and while still behind the skateboard you jump off the ground at an angle of 30.0° above the horizontal hoping to land on the

21. ## physics

You push a skateboard so that it rolls down the road at a speed of 1.20 m/s. You run after the skateboard at a speed of 3.30 m/s and while still behind the skateboard you jump off the ground at an angle of 28.0° above the horizontal hoping to land on the

22. ## physics

a skateboarder with mass 75 kg is riding their skateboard of mass 8 kg at 1.5 m/s. If they decide to jump off sp that their body has no horizontal movement in the air before landing, how fast must the skateboard be moving after they separate

23. ## Physics

A 44 kg child jumps off a 2.2 kg skateboard that was moving at 8.0 m/s. The skateboard comes to a stop as a result. Find the speed at which the child jumped from the board. Show all your work. Assume a frictionless, closed system.

24. ## Physics

You push a skateboard so that it rolls down the road at a speed of 0.700 m/s. You run after the skateboard and jump off the ground with speed 3.20 m/s and an angle of 23.0° above the horizontal hoping to land on the skateboard. How much distance do you

25. ## physics

A friend is making an iMovie and wants your help designing a skateboard stunt. You estimate that your friend�s mass is four times greater than that of the skateboard. For the following questions, ignore friction. In one scenario, your friend starts by

26. ## physics

Jose can jump vertically 1 meter from his skateboard when it is at rest. When the skateboard is moving horizontally, Jose can jump ____________________. A) no higher.B) appreciably higher.C) somewhat higher.

27. ## English

English posted by rfvv yesterday at 2:39am 1. I saw a boy in the car. 2. When I saw a boy, I was in the car. 3. I saw a boy who was in the car. At that time I was near the car. [Does #1 mean either #2 or #3 according to the context? Which one is a common

28. ## physics

A 41.2 kg student runs down the sidewalk and jumps with a horizontal speed of 4.36 m/s onto a stationary skateboard. The student and skateboard move down the sidewalk with a speed of 4.12 m/s. a. Find the mass of the skateboard (in kg) b. How fast would

29. ## physics

(b) A boy wishes to walk on ice block at a constant speed. The coefficient of sliding friction for steel on ice is 0.05 and the boy weighs 150 N. Find the force required to keep the boy moving at a constant speed along the ice.

30. ## Math

I can't figure this out! Help please! The Problem At the local park, I saw a man was quizzing a boy with some simple arithmetic problems, and the boy seemed to be getting them all correct. He asked the boy, "32 + 5", and the boy answered, "37". The man

31. ## Science

You are moving fast on a skateboard when your wheel gets stuck in a crack on the sidewalk. Using the term inertia, explain what happens.

32. ## physics

A boy sitting on the edge of a vertical cliff fires a rock with a slingshot at a velocity of 16.45758956 m/s and an angle of 59.78 degrees above the horizontal. The rock lands in a lake at the base of the cliff, a horizontal distance of 89.67 meters beyond

33. ## Algebra

A survey of voters explored the relationship between the ages of voters and whether or not they support building skateboard ramps at a local park. Chart: Age In Favor Opposed Total 18-37 40 10 50 38-57 27 23 50 58 and 6 44 50 over Total 73 77 150 1.) What

34. ## Math

a skateboard with a mass of 1.5 kg moves up a quarter pipe to a height of 5.0 meters. How fast was it moving at ground level?

35. ## relational database concepts

.Fernando Culebra, owner of Fernando's Skate Shop, still needs your help. Apply what you have learned about the steps of the design process to help Fernando get started in the design of his new database. Complete steps 1 and 2 of the design process by

36. ## College Physics

A boy of mass 64.1 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 7 m above the net. The firefighters lower their arms as he lands in the net so that he is brought to a complete stop in a time of

37. ## physics

A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard. magnitude

38. ## physics

A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard. magnitude

39. ## physics

A boy of mass 54.3 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.4 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard. magnitude

40. ## Physics

A boy of mass 49.4 kg is initially on a skateboard of mass 2.00 kg, moving at a speed of 10.3 m/s. The boy falls off the skateboard, and his center of mass moves forward at a speed of 10.9 m/s. Find the final velocity of the skateboard.

41. ## physics

A boy on a 1.9 kg skateboard initially at rest tosses a(n) 8.0 kg jug of water in the forward direction. If the jug has a speed of 2.7 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.65 m/s, find the boy’s mass.

42. ## physics

A boy on a 2.2 kg skateboard initially at rest tosses a(n) 8.4 kg jug of water in the forward direction. If the jug has a speed of 3.0 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.60 m/s, find the boy’s mass.

43. ## Physics

A boy on a 2.4 kg skateboard initially at rest tosses a(n) 8.2 kg jug of water in the forward direction. If the jug has a speed of 3.0 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.57 m/s, ﬁnd the boy’s mass.

44. ## Physics

A boy on a 2.2kg skateboard initially at rest tosses a 7.9kg jug of water in the forward direction. If the jug has a speed of 3.2m/s relative to the ground and the boy and skateboard move in the opposite direction at .56m/s, find the boy's mass. Answer in

45. ## Science

A boy moves on a skateboard at a constant velocity of 3m.s . The combined mass of the boy and the skateboard is 40kg. He catches a bag of flour of mass 5kg that is thrown to him horizontally at 6m.s . Determine the velocity of the boy after catching the

46. ## Physics

A boy is standing on a skateboard holding two 5.0 kg bowling balls. Initially they are moving to the left at a speed of 3.0 m/s. At one point the boy throws one ball to the right at 4.0 m/s causing his speed to increase. Before he can slow down, he throws

47. ## physics

a 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the skateboard with a horizontal veolicty of 1.5 m/s. what is the recoil velocity of the skateboard ignoring friction? I need help with set up.

48. ## physics

A 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the a skateboard with a horizontal veolicty of 1.5 m/s. what is the recoil velocity of the skateboard ignoring friction?

49. ## physics

A 200kg turtle running at a speed of .4m/s jumps onto a stationary skateboard that masses 3.6kg. the turtle slows to .2m/s by shooting the skateboard out from under him. how fast is the skateboard moving as a result?

50. ## Science Check

Hi! Can someone check my answers? Thanks!! :) Question 1: A skateboarder (coasting with a constant velocity) jumps straight up. What happens she she lands? Does she come down.... A.) behind the skateboard B.) ahead of the skateboard C.) on the skateboard

51. ## science

A boy is riding a skateboard. Why does the skateboard have the ability to do work? because it can slow down because the force applied by the rider acts in the opposite direction as the motion of the skateboard because it can change direction because the

52. ## science

A boy is riding a skateboard. Why does the skateboard have the ability to do work? Answer A. because it can slow down B. because it can change direction C. because the force applied by the rider acts in the same direction as the motion of the skateboard D.

53. ## Physics

You push a skateboard so that it rolls down the road at a speed of 0.700 m/s. You run after the skateboard at a speed of 3.90 m/s and while still behind the skateboard you jump off the ground at an angle of 28.0° above the horizontal hoping to land on the

54. ## Physics

You push a skateboard so that it rolls down the road at a speed of 1.30 m/s. You run after the skateboard at a speed of 4.00 m/s and while still behind the skateboard you jump off the ground at an angle of 33.0° above the horizontal hoping to land on the

55. ## calculus

The velocity of a skateboard is v(t) = t^2 - 4 t + 3 m/s when moving in a straight line. A. Find the the change in displacement of the skateboard between 4 seconds and 6 seconds. (Note this may or may not be negative, meaning it goes in the opposite

56. ## physics30

After performing a trick above the rim of a skateboard ramp, a 56 kg skateboarder lands on the ramp 3.5 m above ground level with a downward velocity of 4.0 m/s. Ep = 0.0 J Ground level. Friction in the wheels of the skateboard and air resistance cause a

57. ## Physics

I am really struggling with these two questions. Please help! 1)Two ice skaters approach each other at right angles. Skater A has a mass of 61.2 kg and travels in the +x direction at 2.25 m/s. Skater B has a mass of 66.2 kg and is moving in the +y

58. ## Math

Amber owns a skateboard shop. Amber wants to buy eight hundred forty-six skateboard wheels. Skateboard wheels sell in sets of two. A set of two skateboard wheels cost five dollars. How much money does Amber spend to buy eight hundred forty-six wheels?

59. ## physics(relativity)

A boy runs a 100m distance in 20s as measured by an observer on earth.how long does it take according to an observer in space ship moving with speed of 0.98c for the boy to complete the run? What is the length of the track according to the moving observer

60. ## science

A boy runs a 100meter distance race in 20seconds as measured by an observer on earth.how long does it take according to an observer in space ship moving with speed of 0.98c for the boy to complete the run? What is the length of the track according to the

61. ## Physics

A 45 kg student runs down the sidewalk at a speed of 4.20m/s and jumps onto the stationary skateboard. The student and skateboard then move down the sidewalk at 3.95 m/s. What type of collision is this? What is the mass of the skateboard?

62. ## physics

A boy on ice skates is atationary on a frozen lake(no friction).He throws a package of mass 5kg at 4m/s horizontally east.the mass of the boy is 60kg.at the instant the package leaves the boy's hand,the boy starts moving. Calculate the magnitude of the

63. ## science

you push yoursef on a skateboard with the force o 30n and the accelerate at 0,5m/s2 find the mass of you and the skateboard together

64. ## physics

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick

65. ## Math

After the sales tax is included in the price of the skateboard, how much will the skateboard cost?

66. ## physics

a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast

67. ## Math

a spinner is spun whose central angles are all 45 degrees. #'s 1-8 on wheel. What is the probability that it lands on 5 if you know the following? a. it lands on an odd # b. it lands on a # greater than 3 c. it does not land on 7 or 8 d. it lands on a

68. ## Physics/Calculus

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.8 m, the bottom of the wheel is 1.8 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions

69. ## physics

(b) A boy wishes to walk on ice block at a constant speed. The coefficient of sliding friction for steel on ice is 0.05 and the boy weighs 150 N. Find the force required to keep the boy moving at a constant speed along the ice.

70. ## physics

A 62-kg boy on a 1.50-kg skateboard moving at +1.2 m/s steps off and lands on the sidewalk with a velocity of +1.1 m/s. How fast is the skateboard moving?

71. ## science

What is the acceleration of a boy on a skateboard is the net force on the boy is 14 N the total mass of the boy and a skateboard is 58 kilograms you said no

72. ## Science

what is the acceleration of a boy on a skateboard if the unbalanced forward force on the boy is 15 N? The total mass of the boy and the skateboard in 58 kg

73. ## physical science

What is the acceleration of a girl on a skateboard if the The unbalanced forward force on the boy is 15 N? The total mass of the boy and skateboard is 58 kg.

74. ## Physics

A 41.2-kg boy, riding a 2.57-kg skateboard at a velocity of +5.82 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.12 m/s, 9.72° above the

75. ## Physics

*62. A 40.0-kg boy, riding a 2.50-kg skateboard at a velocity of +5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.50° above the

76. ## Physics

A 41.2-kg boy, riding a 2.57-kg skateboard at a velocity of +5.82 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.12 m/s, 9.72° above the

77. ## Physics

A 39.2-kg boy, riding a 2.39-kg skateboard at a velocity of +4.97 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.48 m/s, 9.54° above the

78. ## physics

A 43.0-kg boy, riding a 2.20-kg skateboard at a velocity of 5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 8.00° above the

79. ## Physics

A 42.4-kg boy, riding a 2.29-kg skateboard at a velocity of +5.37 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.30 m/s, 9.09° above the

80. ## Science

A boy moves on a skateboard at aconstant velocity of m.s .The combined mass of the and the skateboard is 40g.

81. ## Physics

Concerning Newton's Cradle: a) Determine the velocity of ball 2 just after the collision in terms of vi. Also I am having problems with the following question: A boy moves on a skateboard at a constant velocity of 3 m/s. The combined mass of the boy and

82. ## science

remy noticed that after oiling his skateboard wheels,it was easier to reach the speeds he needed to preform tricks how did the oil help A) the oil reduced friction between the moving parts of the skateboard B)the oil increased friction between the moving

83. ## Science 6

Renny noticed that after oiling his skateboard wheels, it was easier to reach the speeds he needed to perform tricks. How did the oil help? A:The oil reduced friction between the moving parts of the skateboard. B:the oil increased the friction between the

84. ## science

A boy is riding a skateboard. Why does the skateboard have the ability to do work? A. because it can slow down B. because it can change direction C. because the force applied by the rider acts in the same direction as the motion of the skateboard D.

85. ## Physics

A skateboarder of mass 38.0 kg is riding her 3.90-kg skateboard at a speed of 5.40 m/s. She jumps backward off her skateboard, sending the skateboard forward at a speed of 8.5 m/s. At what speed is the skateboarder moving when her feet hit the ground?

86. ## science !!! help

please answer these 4 questions about since I know nothing about this. 1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done? A. 0.040 j B.9 j C.14 j D.25 j 2.to chop wood you apply 50.0n of force to an ax.

87. ## Physics

Your brother's mass is 35.6 kg and he has a 1.3-kg skateboard. What is the combined momentum of your brother and his skateboard if they are moving at 9.50 m/s?

88. ## Physics

A 1.25 kg skateboard is coasting along the pavement at a speed of 4.24 m/s when a 1.00 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

89. ## Physics

A 1.08 kg skateboard is coasting along the pavement at a speed of 4.60 m/s when a 1.19 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

90. ## Physics

A 1.08 kg skateboard is coasting along the pavement at a speed of 5.30 m/s when a 1.05 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

91. ## physics

A 1.13 kg skateboard is coasting along the pavement at a speed of 4.28 m/s when a 0.93 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

92. ## physics

A 1.22 kg skateboard is coasting along the pavement at a speed of 5.84 m/s when a 1.20 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

93. ## PHYSICS

A BOY OF MASS 50KG CLIMBS UP 29 STEPS EACH 20CM HIGH.HOW MUCH WORK IS DONE BY THE BOY (G=10M/S)

94. ## physics

Carmen is standing on a giant skateboard that is initially at rest. If we ignore frictional effects with the floor, what is the momentum of the skateboard if Carmon walks to the right with a momentum of 500 ? A. 500 to the right B. 500 to the left C. zero

95. ## physics

A 1500kg car moving at a speed of 20 m/s comes to a halt. How much work was done by the brakes? How fast can a 2.0 horsepower motor lift a 200 kg mass? A boy with a mass of 20 kg is riding on a 10 kg cart which is travelling at 3 m/s. He jumps off in such

96. ## physics

Your brothers mass is35.6kg and he has a1.3 kg skateboard.what is the combined momentum of your brother and his skateboard if they are going 9.50m/s?

97. ## physics

a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast

98. ## physics

a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast

99. ## Physics

A 45 kg cart is moving across a frictionless floor at 1.7 m/s. A 60 kg boy, riding in the cart, jumps off the cart so that he hits the floor moving forwards in the initial direction of the cart's motion with a velocity of 2.8 m/s. What is the velocity of

100. ## trig

A skateboard wheel has a radius of 2.08 inches and is turning at a rate of 945 rpm. a. what is the angular speed in radians per second? in degrees per second? b. how fast is the skateboard traveling (in miles per hour)?