Question

You lift a large bag of flour from the floor to a 2.5m high counter, doing 400J of work in 2 seconds. How much force did you apply?

Answer 1

The man have to apply force of 160 N

Explanation:

The work done to lift the bag of weight mg through height 2.5 m is 400 J

The work done can be found by relation  W = mg x h

Thus mg = $\frac{W}{h}$ = $\frac{400}{2.5}$ =  160 N

Therefore the man have to apply the force of 160 N

Answer 2

Answer:160newtons

Explanation:

Work=400J

Distance=2.5m

Time=2 seconds

Force=?

Force=work/distance

Force=400/2.5

Force=160

Force=160 newtons