| 41. |
| A ball is rolling down a curved
slide. Which is the correct path after it rolls past the end
of the slide several meters above a lake?
Answer
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| Use the graph to the right for the
next three questions.
42. Which segment has a constant reverse velocity?
43. Which segment has the object not moving?
44. Which segment represents acceleration?
Answers 42 to 44 |
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| 45. |
| (Assume no friction) An
initially stationary 10.0 kg
cart then slides down the track to the right. After passes over he
second hill, it reaches a second valley. How much kinetic
energy does the cart have when it reaches height , h3 ?
A. 98.0 h3
C. 98.0 (h1 - h3)
B. 98.0 (h2 - h3)
D. 98.0 (h1 - h2)
Answer |
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| 46. |
| The arrows represent forces being
applied to a box on a frictionless surface. Which combination
of forces will give the box the greatest acceleration?
Answer
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| 47. |
A 300. g soccer ball
initially at rest is kicked giving the ball a speed of 45.0 m/s. If
a force of 50.0 N is applied, how long was the foot in contact with the
ball? Answer
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A. |
0.081 s |
C. |
0.27 s |
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B. |
0.100 s |
D. |
0.33 s |
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| 48. |
What is the kinetic
energy of a 1.50 x 103 kg Mustang with speed of 120. km/h ?
Answer
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A. |
2.50 x 105 J |
C. |
5.00 x 105 J |
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B. |
8.32 x 105 J |
D. |
1.66 x 105 J |
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| 49. |
As a ball rolls down
a hill Answer
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A. |
kinetic energy and potential energy both
increase. |
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B. |
kinetic energy increases and potential
energy decreases. |
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C. |
kinetic energy decreases and potential
energy increases. |
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D. |
kinetic energy and
potential energy both decrease. |
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| 50. |
A 7.50 kg bowling
ball sliding 35.0 m/s on a frictionless surface is stopped by a spring
with a force constant of 450. N/m. How far is the spring compressed
before it stops? Answer
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A. |
0.583 m |
C. |
2.04 m |
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B. |
0.764 m |
D. |
4.52m |
