A block of mass 2 kg is kept gently on a moving tape of a machine in which the rotating cylinders have angular speed of 20rad/sec and their radius is 20 cm. If coofficient of friction between the tape and block is 0.5 and the __
a. The distance travelled by the block before relative motion with tape ceases is 1.6 m
b. Work done by friction on the block is 8 N
c. Work done by friction on the block is −16 N
d. Linear velocity of tape is 40 m/s