1.
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An Olympic diver dives off the high-diving platform. The magnitude of his momentum will be a maximum at point 
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| A |
| B |
| C |
| D |
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2.
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Which of the following can best be described as an elastic collision?
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| A falling tree hitting the earth. |
| A linebacker stopping a fullback. |
| A golf club striking a golf ball. |
| A pie in the face. |
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3.
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The Center of Mass of which of the following objects would not lie within the body itself?
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| baseball |
| brick |
| frisbee |
| paperback book |
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4.
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What is the magnitude of the impulse as shown in the following figure? 
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| 100 Ns |
| 900 Ns |
| 1000 Ns |
| 1100 Ns |
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5.
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If the impulse is applied to a particle at rest what will be its final momentum?
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| 100 kg m/s |
| 900 kg m/s |
| 1000 kg m/s |
| 1100 kg m/s |
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6.
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What is the impulse shown in the following figure? 
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| 225 Ns |
| 450 Ns |
| 900 Ns |
| 1000 Ns |
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7.
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If the impulse is applied to a 200 gm model rocket at rest what will be its final speed?
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| 2.25 m/s |
| 22.5 m/s |
| 2250 m/s |
| 4500 m/s |
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8.
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What constant force acting over the same time as the force in question 6 would produce the same impulse?
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| 45 N |
| 50 N |
| 90 N |
| 100 N |
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9.
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If each mass in the figure is 1 kg, what is the x location of the center of mass? 
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| .5 |
| .67 |
| 1.0 |
| 1.33 |
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10.
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If each mass in the figure is 1 kg, what is the y location of the center of mass?
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| .33 |
| .5 |
| .67 |
| .85 |
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11.
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If the mass of m1 and m3 in the figure is 1 kg and m2 is 2 kg, what is the x location of the center of mass?
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| 1.33 |
| 1.0 |
| .67 |
| .33 |
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12.
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If the mass of m1 and m3 in the figure is 1 kg and m2 is 2 kg, what is the y location of the center of mass?
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| .75 |
| .5 |
| .33 |
| .25 |
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13.
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If the mass of m1 is 1 kg and m3 is 2 kg in the figure and m2 is 3 kg, what is the x location of the center of mass?
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| .67 |
| 1.17 |
| 1.33 |
| 1.67 |
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14.
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If the mass of m1 is 1 kg and m3 is 2 kg in the figure and m2 is 3 kg, what is the y location of the center of mass?
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| .25 |
| .5 |
| .67 |
| .75 |
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15.
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If all the masses in the figure have a mass of 2 kg, and m2 has speed 2 m/s and m3 has a speed of 4 m/s, what is the x-component of the momentum of the center of mass? 
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| 2 kg m/s |
| 4 kg m/s |
| 6 kg m/s |
| 10 kg m/s |
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16.
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If all the masses in the figure have a mass of 2 kg, and m2 has speed 2 m/s and m3 has a speed of 4 m/s, what is the y-component of the momentum of the center of mass?
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| 2 kg m/s |
| 4 kg m/s |
| 8 kg m/s |
| 10 kg m/s |
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17.
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What is the magnitude of the momentum of the center of mass of the system of particles in question 15?
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| 4 kg m/s |
| 8 kg m/s |
| 8.9 kg m/s |
| 10 kg m/s |
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What is the direction of the momentum of the center of mass of the particles in question 15, as measured in degrees counter clockwise from East.
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| 15 |
| 34 |
| 45 |
| 63 |
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19.
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A 12000 kg railroad car travelling at 10 m/s strikes and couples with a 6000 kg caboose at rest. What is the speed of the final combination?
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| 3.3 m/s |
| 5.0 m/s |
| 6.7 m/s |
| 10 m/s |
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20.
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A 12000 kg railroad car travelling at 10 m/s strikes and couples with a 6000 kg caboose at rest. What is the loss of Mechanical Energy in the collision?
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| 50000 J |
| 100000 J |
| 200000 J |
| 250000 J |
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21.
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A 12000 kg railroad car travelling at 10 m/s strikes and couples with a 6000 kg caboose at rest. What would be the speed of the combination of railroad cars if the caboose was initially rolling towards the other car with a speed of 2 m/s?
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| 5.2 m/s |
| 6.0 m/s |
| 7.3 m/s |
| Review Section 9-4 in Walker. |
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22.
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A billiard ball travelling to the right at 6m/s overtakes and strikes an identical ball travelling at 3 m/s. What is the speed of the first ball after the collision?
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| -6 m/s |
| -3 m/s |
| 3 m/s |
| 6 m/s |
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23.
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A billiard ball travelling to the right at 6m/s overtakes and strikes an identical ball travelling at 3 m/s. What is the speed of the second ball after the collision?
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| -6 m/s |
| -3 m/s |
| 3 m/s |
| 6 m/s |
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24.
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A billiard ball travelling to the right at 6m/s overtakes and strikes an identical ball travelling at 3 m/s. What is the speed of the first ball after collision if the second ball was travelling at it (instead of away from it) with a speed of 3 m/s before collision?
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| -6 m/s |
| -3 m/s |
| 3 m/s |
| 6 m/s |
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25.
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What is the speed of the second ball in question 24 after collision?
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| -6 m/s |
| -3 m/s |
| 3 m/s |
| 6 m/s |
