Question

an object of mass m and velocity v has kinetic energy =200J. find the new kinetic energy if the mass of the object becomes double and velocity still remains same?

Answer 1

new kinetic energy will become double as before then the answer will be 400 June

Answer 2

Answer:

Let KE in 1st condition be x

x = 1/2* mv^2 = 200J

Let KE in 2nd case be x'

v' = v

m' = 2m

x' = 1/2*m*v^2

x' = 2(1/2*m*v^2)

x' = 2(1/2*m*v^2)

x' = 2 * x

x' = 2 * 200 J

x' = 400 J

Therfore Kinetic Energy = 400 J

Hope it helps. : )