Question

if the velocity of a body increases by 3 times the previous value the percentage change in KE​

Answer 1

Answer = 1500%.

There is a difference in "increased to " and "increased by ". Increased by means additional extra amount. " Increased to " means the final amount.

Here in the question, "increased by ", it is stated.

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KE =

where m = mass, v = velocity of the body.

Initial KE =

Velocity increases by 3 times. It means that it becomes 4 times. Because v2 = v1 + 3 v1 = 4 v1.

Final KE =

So answer is 1500%.

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Answer 2

Answer:

as the KE is directly proportional to square of the velocity KE also increases by nine times

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