Question

A oarticle of mass 100kg moving at an initial speed u collides with another particle of same mass kept initially at rest. If the total kinetic energy becomes 0.2 j after the collision what could be the minimum and maximum value of u

Answer 1

For maximum value of u, denominator should be minimum in the above equation.
i.e. e = 0
⇒ u2 = 8

⇒ u=22‾√ m/s

For minimum value of u, denominator should have maximum value.
i.e. e = 1
⇒ u2 = 4

⇒ u = 2 m/s