posted by Anonymous .
A person lifts a 5.5 kg cement block a vertical distance 1.1 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process.
J (by person)
J (by force of gravity)
No work is done during the horizontal motion.
The vertical-motion work done by the person is m g h. (h = 1.1 m)
Gravity does the same amount, but qwith a minus sign.