(c) The velocity ratio of a combination of n movable pulleys with a fixed pulley is always 2n.
(d) The velocity ratio of a block and tackle system is always equal to the number of strands of the tackle supporting the load.
Solutions :
(c) A combination of n mobile pulleys and a stationary pulley always has a velocity ratio of 2n (True)
(d) In a block and tackle system, the velocity ratio is always equal to the number of strands in the tackle sustaining the load (True)