physics
posted by katt .
A 89.0 N grocery cart is pushed 13.0 m 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 its final speed?

KE gained=workinput
1/2*89*Vf^2=40*13
solve for Vf 
thanks so much
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