In a), no work is done to move horizontally 'across" gravity. In b), he does (m) (g) (h) = (100)(9.8)(1) = 980 joules of work to lift the bag, and then no more work is done by the belt to move both of them horizontally.
Answer:
look if its at school
Explanation:
just ask teacher to help because if we say you will not learn
just say to teacher"pls can you help me with this and everything you
don't understand
Accept the flow of current and is measured in ohms