When the speed of an object is multiplied by 6, its kinetic energy
(A) stays the same.
(B) is multiplied by 6.
(C) is multiplied by 9.
(D) is multiplied by 36.
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(A) stays the same. --- No.
It increases.
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(B) is multiplied by 6. --- No.
It is proportional to the square of the speed.
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(C) is multiplied by 9. --- No.
That would be the answer
if the speed were tripled.
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(D) is multiplied by 36. --- Yes.
It is proportional to the speed squared
and 6 times 6 is 36.
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