Question #70f00

1 Answer
Swarna Islam
Dec 31, 2017

The velocity will be increased by 2 times.

Explanation:

Here,the KE of a body is increased by 4 times

#KE'=4KE#

#or,1/2(mv')^2=4xx1/2mv^2#

#or,(v')^2=4v^2#

#:.v'=2v#

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