Question

a mechanic pushes a 5 - kg load on a cart across a garage floor made of cement. the mechanic then pushes the same load across a grassy surface with the same force. he finds that the cart moves faster on the cement than on the grass. what could be causing the change in the speed of the cart? applied force force of gravity frictional force mass of the load

Explanation:

The applied force is the same in both cases, and the mass of the load and force of gravity remain constant. Friction opposes motion. Grass has a rougher surface than cement, creating more frictional force which slows down the cart.

Answer:

C. frictional force