There are two possibilities for this question: 1- The shopping cart is at rest (not moving): In this case: ∑Forces = 0 Force exerted by Jim + Force exerted by cart = 0 2 + Force exerted by cart = 0 Force exerted by cart = -2
2- The cart is moving as a result of a net force "m": In this case: ∑Forces = m Force exerted by Jim + Force exerted by cart = m Force exerted by cart = m-2
