1. A brick and a peanut are dropped of the roof of a house at the same time, which object hits the ground first? (Ignore air resistance).

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

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy