Question

Question #a4f96

Answer 1

`F = 21.9` `"N"`

Explanation:

We're not given any information regarding the slope of the incline to determine the gravitational force opposing the motion, nor the friction between the sled and the incline. I will neglect these and assume a simplified work example.

The equation for one-dimensional work is

`ul(W = Fs`

where

• `W` is the work

• `F` is the magnitude of the force

• `s` is the distance it traveled while the force was acting

We know:

• `W = 379.5` `"J"`

• `s = 17.3` "`m"`

So we have

`color(red)(F) = W/s = (379.5color(white)(l)"J")/(17.3color(white)(l)"m") = color(red)(ulbar(|stackrel(" ")(" "21.9color(white)(l)"N"" ")|)`

The magnitude of the force she exerted is thus `color(red)(21.9color(white)(l)"newtons"`.