3. A motor pulls a crate, mass M, vertically a distance D in Z seconds. The crate is moving at a relatively slow velocity. The gravitational field strength is g. a. How much work is done on the crate by the motor? b. How much work is done by gravity on the crate? C. How much power is need to raise the crate?

3. A motor pulls a crate, mass M, vertically a distance D in Z seconds. The crate is moving at a relatively slow velocity. The gravitational field strength is g. a. How much work is done on the crate by the motor? b. How much work is done by gravity on the crate? C. How much power is need to raise the crate?