| 1 |
A boy hits a 0.05-kg golf ball, giving
it a speed of 75 m/sec. What impulse did he deliver to the ball?
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| 2 |
If the duration of impact in question #1 is 0.01 seconds, what was the
average force of impact?
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| 3 |
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| 4 |
Two children, totaling 200 kg, are traveling at 10 m/sec in a 100-kg bumper car during an
amusement park ride. They deliberately collide with an empty second car, mass 100
kg, which is at rest. Afterwards, the car with the two children moves off at a speed
of 4.0 m/sec. What is the final velocity of the empty car?
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| 5 |
James, a 65-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/sec
at a fish which is darting past him. How fast does James recoil when the spear is
initially released?
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| 6 |
Running at 2 m/sec, Jack, the 45-kg quarterback, collides with Leon, the 90-kg tackle, who
is traveling towards him at 7.0 m/sec. Upon colliding, Leon continues to
travel forward towards Jack, at 1.0 m/sec. How fast is Jack
knocked backwards?
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| 7 |
A 620-kg moose stands in the middle of the railroad tracks in Sweden, frozen by the lights
of an oncoming 10,000-kg locomotive traveling at 10 m/sec. Even though the engineer
attempted in vain to slow the train down in time to avoid hitting the moose, the moose
rides down the remaining track sitting on the locomotive's cowcatcher. What is the
final velocity of the locomotive and moose after the collision?
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| 8 |
On a hot summer day, Jack and Leon are fishing in their boat, when they decide to
jump into the water to cool off. Jack, 45-kg, jumps off the front of the boat with a
speed of 2 m/sec. While at the exact same moment, Leon, 90-kg, jumps out of the back
of the boat at a speed of 4 m/sec. If the boat has a mass of 100 kg and was at rest
prior to the two boys jumping off, what will be its velocity just after both boys
have abandoned ship?
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