A block and tackle system consisting of five pulleys is used to raise a load of 400 Newtown through a height of10meter. if the work done against friction is 100 joule calculate the effort applied?

Answer 1

To solve this problem, we can use the formula:

Work done = Force applied × distance

Given that the work done against friction is 100 Joules, the force applied is the effort applied (E), and the distance is the height the load is raised, which is 10 meters. The force of friction is not given, but it can be assumed to be negligible compared to the force needed to raise the load.

So, we have:

100 Joules = E × 10 meters

Solving for E:

E = 100 Joules / 10 meters
E = 10 Newtons

Therefore, the effort applied to raise the load of 400 Newtons through a height of 10 meters is 10 Newtons.