Question #a4f96
1 Answer
Aug 19, 2017
Answer:
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 onedimensional 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