Figure shows a block and tackle system of pulleys used to lift a load. (a) How many strands of tackle are supporting the load ? (b) Draw arrows to represent tension T in each strand. (c) What is the mechanical advantage of the system? (d) When load is pulled up by a distance 1 m, how far does the effort end move ? (e) How much effort is needed to lift a load of 100 N?

Figure shows a block and tackle system of pulleys used to lift a load.

1.	Figure shows a block and tackle system of pulleys used to lift a load. (a) How many strands of tackle are supporting the load ? (b) Draw arrows to represent tension T in each strand. (c) What is the mechanical advantage of the system? (d) When load is pulled up by a distance 1 m, how far does the effort end move ? (e) How much effort is needed to lift a load of 100 N?
Answer» Answer :(a) 4 (C) 4 (d) 4M (E) 25 N