Under what circumstances will the projectile have the greatest velocity when it hits the ground? Explain please

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?