Alever is used to lift a heavy rock. the mechanical advantage of the lever is 4 and the lever applies a force of 800 n to the rock. what is the force applied to the lever?

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents

Energy transformations that involve one transformation from one type of energy to another are called transformations.