A0.0780 kg lemming runs off a 5.36 m high cliff at 4.84 m/s. what is its total mechanical energy(me)

5.01 J

Explanation:

ME = KE + PE

ME = ½ mv² + mgh

ME = ½ (0.0780 kg) (4.84 m/s)² + (0.0780 kg) (9.8 m/s²) (5.36 m)

ME = 5.01 J

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.