Question

By using block and tackle system, a person can raise a load of 20kgf by an effort of 1 7 dynes. Find : i) The mechanical advantage of the system. ii) The person’s useful power output if he raises the load through 10m in 2 mins. [g = 9.8ms-2 ]

Answer 1

Answer:

Explanation:

Double pulley can required less efforts than single pulley to move loads. Higher mechanical advantage means that less effort is required to move the same load. By using a double pulley we requird a less effort to move the same load as compare to single one for that purpose we employed double pulley