. A cord is wrapped around a pulley of mass m and radius r. The free end of the cord
is connected to a block of mass M. The block starts from rest and then slides down
an incline that makes an angle θ with the horizontal. The coeﬃcient of kinetic friction
between block and incline is µ.
(a) Use energy methods to show that the block’s speed as a function of position d
down the incline is
v=sqrt [4gdm( sin(th)- µcos(th)))/ (m+2m)]

Question

. A cord is wrapped around a pulley of mass m and radius r. The free end of the cord
is connected to a block of mass M. The block starts from rest and then slides down
an incline that makes an angle θ with the horizontal. The coeﬃcient of kinetic friction
between block and incline is µ.
(a) Use energy methods to show that the block’s speed as a function of position d
down the incline is
v=sqrt [4gdm( sin(th)-  µcos(th)))/ (m+2m)]