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1. |
Find the initial horizontal velocity and vertical velocity of a stone kicked with an initial velocity of 15 feet per second at an angle of 42° with the ground. |
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A. |
about 14 ft/s, about 12 ft/s |
B. |
about 10 ft/s, about 22 ft/s |
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C. |
about 11 ft/s, about 13 ft/s |
D. |
about 11 ft/s, about 10 ft/s |
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Hint |
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2. |
A football player kicks a football with an initial velocity of 25 yards per second at an angle of 77° to the horizontal. What is the hang time, the elapsed time between the moment the ball is kicked and the time it hits the ground? |
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A. |
about 4.4 seconds |
B. |
about 4.2 seconds |
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C. |
about 4.8 seconds |
D. |
about 4.6 seconds |
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Hint |
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3. |
Hetu is playing catch with a friend. If Hetu throws the ball at 21.3 m/s, at an angle of 30° with the horizontal, and his friend catches the ball at the same height from which Hetu threw it, how long is it before his friend catches the ball? |
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A. |
1.41 s |
B. |
2.17 s |
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C. |
10.65 s |
D. |
0.46 s |
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Hint |
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4. |
Hetu is playing catch with a friend. If Hetu throws the ball at 21.3 m/s, at an angle of 30° with the horizontal, and his friend catches the ball at the same height from which Hetu threw it, how far away is his friend standing? |
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A. |
40.0 m |
B. |
53.4 m |
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C. |
23.1 m |
D. |
46.2 m |
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Hint |
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5. |
If Jeannette punts a soccer ball into the air with a velocity of 11 m/s at an angle of 58 with the horizontal, what is the vertical velocity of the soccer ball just before it hits the ground? |
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A. |
5.8 m/s |
B. |
4.9 m/s |
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C. |
9.3 m/s |
D. |
0 m/s |
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Hint |
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