Question

A 10 Newton effort force is required to lift a 10 kg box just off the ground. What is the effort required to lift the box off the ground using a 3m long lever? [The fulcrum is placed 0.5m from the box.]

Answer 1

Answer:

effort required to  lift the box off the ground using a 3m long lever=2N

Explanation:

In this question we have given

force required,F=10N

mass of box.m=10kg

length of lever, l=3m

distance between fulcrum and box,d=.5m

effort required to  lift the box off the ground using a 3m long lever=?

Here,

Effort required to  lift the box off the ground using a 3m long lever $\times (3m-0.5m) =F \times 0.5m$

Effort required to  lift the box off the ground using a 3m long lever $\times (3m-0.5m) =10N \times 0.5m$

Effort=$\frac{10\times 0.5}{3-0.5}$

Effort=2N

Answer 2

2.0 N is the answer, I hope this helps :D