Question

a body of mass M moving with velocity V collides head on with another body of mass 2m which is initially at rest the ratio of K.E of colliding body before and after collision will be ​

Answer 1

Answer:

9

Explanation:

the answer depends on whether the collision is elastic or inelastic

if its elastic:

before collision velocity =v

after collision velocity =-v/3(using momentum conservation it can be easily calculated)

So ratio of KE=square(v)/square(v/3)=9