In any system, the in the system remains constant, while the PE or KE may change.

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.