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Torrey's neighbor told her that a marble rolling down a hill increases in velocity as it rolls down, but does not increase in kinetic energy because energy can neither be created nor destroyed, so it always has the same amount kinetic energy is Torrey's neighbor correct ? If they are correct, explain how you know . If they are not correct would you explain to them the fault in their thinking ?

Sagot :

Answer:

Torrey's neighbour is incorrect because increase in kinetic energy is proportional to velocity.  If the velocity increases so will the object's kinetic energy.  Because the mass is constant, if the velocity increases, so does the kinetic energy.

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