Solve for unknown projectile motion

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?