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

Answer:160newtons

Step-by-step explanation:

Work=400J

Distance=2.5m

Time=2 seconds

Force=?

Force=work/distance

Force=400/2.5

Force=160

Force=160 newtons

Answer 2

The man have to apply force of 160 N

Step-by-step 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 =
`(W)/(h)` =
`(400)/(2.5)` = 160 N

Therefore the man have to apply the force of 160 N