1. | Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of |
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2. | In a pendulum, if the KE decreases |
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3. | When an object is lifted 10m, it gains a certain amount of PE. If the same object is lifted 20m, its potential energy gain is |
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4. | If object A travels at 5 m/s, and object B has the same mass but travels twice as fast. How much more KE will the second object have? |
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