A particle of mass m is tied with a rope and is rotated along a horizontal circular path. The length of the rope is r_(0) and the velocity of the particle is v_(0). What amount of work should be done to decrease the length of the rope to r ?

A particle of mass m is tied with a rope and is rotated along a horizo

1.	A particle of mass m is tied with a rope and is rotated along a horizontal circular path. The length of the rope is r_(0) and the velocity of the particle is v_(0). What amount of work should be done to decrease the length of the rope to r ?
Answer» Answer :`(1)/(2)mv_(0)^(2){((r_(0))/(r))^(2)-1}`