1.
|
|
A ball moves with a constant speed of 10 m/s at an angle of 30 degrees with the x-axis, what is the x-component of its velocity?
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| 2 m/s |
| 5 m/s |
| 8.7 m/s |
| 10 m/s |
|
2.
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What is the y-component of the velocity of the ball in question 1?
|
| 2 m/s |
| 5 m/s |
| 8.7 m/s |
| 10 m/s |
|
3.
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How far does the ball in question 1 travel in the x direction in 2 seconds?
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| 4 meters |
| 10 meters |
| 17.4 meters |
| 20 meters |
|
4.
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How far does the ball in question 1 travel in the y direction in 2 seconds?
|
| 4 meters |
| 10 meters |
| 17.4 meters |
| 20 meters |
|
5.
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Suppose that several projectiles are fired on level ground. Which one will be in the air longest?
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| The one with the farthest range, R. |
| The one with the highest maximum elevation, h. |
| The one with the greatest initial velocity. |
|
6.
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Which of the following does not affect the range of a projectile?
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| vo Initial Speed |
| thetao Launch Angle |
| yo Initial Height |
| xo Initial Horizontal Position |
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7.
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Which of the following must be zero for a projectile to achieve its maximum range?
|
| vxf |
| vyf |
| xf |
| yf |
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8.
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Which of the following must be zero for a projectile to be at its maximum height?
|
| vxm |
| vym |
| ym |
| xm |
|
9.
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You hit a handball too hard and it lands, moving horizontally, on top of a roof. If its original velocity was vo at an angle q above the horizontal, then the velocity it lands on the roof with is
|
| zero |
| vo sin q |
| vo cos q |
| 2vo |
|
10.
|
|
 You throw a pebble upward as shown, with a velocity vo at an angle theta, from a roof (at point J) h ft above the ground. If the pebble rises upward to h ft above the roof (to point K), then falls to the ground below (to point L), its speed when it hits the ground is
|
| vo. |
| between vo and 2vo. |
| 2vo. |
| greater than 2vo. |
|
11.
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A ball is hit off a 1 meter high tee at 20 m/s at an anle or 70 degrees and lands on top of a 3 meter high truck, what is its initial y position, yo? (Ground level is zero.)
|
| 0 meters |
| 1 meter |
| 2 meters |
| 3 meters |
|
12.
|
|
In question 11 what is the initial x position, xo?
|
| 0 meters |
| 1 meter |
| 2 meters |
| 3 meters |
|
13.
|
|
In question 11 what is vox?
|
| 0 m/s |
| 6.84 m/s |
| 18.8 m/s |
| 20 m/s |
|
14.
|
|
In question 11 what is voy?
|
| 0 m/s |
| 6.84 m/s |
| 18.8 m/s |
| 20 m/s |
|
15.
|
|
In question 11 what is the final y position?
|
| 0 meters |
| 1 meter |
| 2 meters |
| 3 meters |
|
16.
|
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In question 11 what ia the distance between the tee and the truck?
|
| 0.75 meters |
| 20.1 meters |
| 25.5 meters |
| 40.1 meters |
|
17.
|
|
In question 11 what is the time of travel of the ball?
|
| 0.1 s |
| 3.7 s |
| 5 s |
| 12 s |
|
18.
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In question 11 what is the horizontal speed of the ball at its maximun height?
|
| 0 m/s |
| 6.84 m/s |
| 18.8 m/s |
| 20 m/s |
|
19.
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In the previous question what is the vertical velocity?
|
| 0 m/s |
| 6.84 m/s |
| 18.8 m/s |
| 20 m/s |
|
20.
|
|
In question 19 what is the acceleration?
|
| -9.81 m/s2 |
| 0 m/s2 |
| +9.81 m/s2 |
|
21.
|
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In question 19 what is the maximum altitude?
|
| 5 meters |
| 9 meters |
| 12 meters |
| 18.8 meters |
|
22.
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In question 11 where is the speed the greatest?
|
| start |
| top |
| end |
|
23.
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The formula for the range of a projectile
|
| assumes that yo is zero. |
| assumes that yo is not zero. |
| assumes that xo is zero. |
| assumes that xo is not zero. |
|
24.
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What is the range of a projectile launched horizontally with a speed of 9.8 m/s?
|
| 9.8 meters |
| 14.1 meters |
| 20 meters |
|
25.
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Which of the following is not an example of projectile motion?
|
| football pass |
| basketball shot |
| space shuttle launch |
| home run |
| volley ball serve |
