Question

What will be the kinetic energy of the body (i)when mass is doubled

Answer 1

If velocity is kept constant then with double the mass, kinetic energy will also double.

Answer 2

According to the Question :-

${\implies KE = \dfrac{1}{2}\times mv^{2}}$

When :-

m` = 2m

 ${\implies KE = \dfrac{1}{2}\times(2m)v^{2}}$

 ${\implies KE = 2\times\dfrac{1}{2}\times mv^{2}}$

KE` = 2KE