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A bowling ball is placed at the top of an incline and released. You run two different trials.

For the first trial, the incline provides friction.

For the second trial, the incline is frictionless.

You measure the time for both trials. The second trial has a shorter time meaning that the bowling ball was moving faster at the bottom of the ramp without friction.

Which statements below explains this discrepancy in the times?

Select TWO answers.


Without friction on the second ramp, the bowling ball spins slower than it did on the first ramp which means that the kinetic energy and the speed of the bowling ball are greater. It will take less time to reach the bottom.


There is experimental error in the time measurements. The predicted times should be the same since energy is conserved in both runs.


Some of the original potential energy is lost to friction on the first ramp (as heat, noise, etc.). The kinetic energy is less at the bottom when friction is present.


Some of the original potential energy is lost to rotational kinetic energy on the first ramp. The linear speed is greater when the bowling ball does not rotate.

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