A spacecraft is in a circular Earth orbit at an altitude of 5400 km . By how much will its altitude decrease if it moves to a new circular orbit where (a) its orbital speed is 10% higher

Which of the following are appropriate acceleration units?

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?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.