1.

A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force `vecF=(30N)hati-(40N)hatj` to the cart as it undergoes a displacement `vecs=(9.0m)hati-(3.0m)hatj.` How much work does the forces you apply do on the grocery cart ?A. `150 J`B. `390 J`C. `-150 J`D. `270 J`

Answer» Correct Answer - B
Work= `vecF.vecS=(30xx9)+(40xx3)=390J" ""]"`


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