What force must the people overcome in order to lift the rock? (rock on one end and two guys on the other end)

Will a heavier bowling ball hit pins better than a lighter bsll

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

Acompound machine is also called a machine. a. force b. simple c. complex d. directional