Amy uses 20 N of force to push a lawn mower 10 meters How much work does she do?

Answer 1

A force of 5 newtons acting through a distance of 10 meters does (5 x 10) = 50 joules of work.

The weight of the cart and the slope of the surface are not required and are of no interest.

Answer 2

This is tough, because she's probably not pushing exactly parallel to the ground. Part of
her force is pointing straight down at the ground, while another part of the force pushes
horizontally. Only the horizontal 'component' does work; it's less than 20N.

But ... we don't know the height of the handles above ground, or how tall Amy is, or what the
angle is between the handle and the ground ... any of the stuff that would help us calculate
how much of the 20N actually moves the mower. So we have to just assume that she's
pushing horizontally with the whole 20N.

Then the work is [ (force) times (distance) ] = (20 x 10) = 200 newton-meters.

Answer 3

"20 newtons" is not work at all. It's force, equivalent to about 4.5 pounds.

Answer 4

Work = Force x distance

So,

W = 20 N x 10 m

= 200 J

a Newton Meter is a Joule

Answer 5

Work = force x distance = 20N x 10m = 200N•m

Answer 6

W=Fd

20N*10m=200N*m

Answer 7

9 joules