A lever with an effort arm of 10 meters and a load arm of 2 meters is used to lift an object weighing 220 Newtons to a height of 4 meters. If 400Joules of work is done, how much force must have been applied?

Question

A. 100 N
B. 4000 N
C. 1600 N
D. 800N

Answer 1

To solve this problem, we can use the concept of work done.

The work done is given by the formula: Work = Force x Distance.

In this case, we are given that the work done is 400 Joules, the distance is 4 meters, and we need to find the force.

We can rearrange the formula to solve for Force:

Force = Work / Distance.

Force = 400 Joules / 4 meters.

Force = 100 Newtons.

Therefore, the force that must have been applied is 100 Newtons.

So, the correct answer is A. 100 N.