Question #25a8e

1 Answer
Vartika · 1s2s2p
Nov 8, 2017

K.E will increase by 9 times.

Explanation:

E_k= (mv^2)/2

Let v be 3v so v^2= 9v

(E_(k1))/(E_(k2))=(mv^2)/2÷(m(3v)^2)/2

(E_(k1))/(E_(k2))=(2mv^2)/(2m9v^2)=1/9

E_(k2)=9E_(k1)

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