Explain energy interconversions?

Please explain the energy interconversions of a shuttlecock..:):) and please compare the energy in a normal shuttlecock and a doubled mass shuttlecock?|||When a badminton bat is moving, it is having momentum. Transfer of momentum from bat to shuttlecock within a time period is a force. The amount of momentum (not impulsive force) being transferred is in conjunction with contact time in between racket and shuttlecock, that is, the longer the contact time, the more momentum is transferred. For a trivial bit, the elasticity of racket net determines the contact time. So, force = (mv-MV)/t %26lt;=%26gt; ft = (delta mv)