A 107.0 N grocery cart is pushed 14.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is the grocery cart's final speed?

Answer 1

The work done, which is

W = F*X = 40N*14.0m = ___ J ,

is equal to the increase in kinetic energy,
(1/2) M Vf^2 .

Therefore Vf = sqrt(2*f*X/M)
is the final speed.