You push a shopping cart with a force of 12n for a distance of 1.5m. you stop pushing the cart, but it continues to roll for 1.1 m. how much work did you do?

answer; /// i believe that the correct answer is (50%);

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.