Question

A man applies a force of 120 N to lift a heavy body of weight 80 N by a crowbar of length1.25 m. What is the length of the effort arm?

Answer 1

Suppose the length of effort arm=x
Load arm=1.25-x
Using

Principle of lever

Load × Load arm = Effort × Effort arm
80 X (1.25-x)=120 X x
effort arm, x=0.5 m