The tallest Sequoia sempervirens tree in California's redwood national park is 111m tall. Suppose an object is thrown downward from the top of that tree with a certain initial velocity. if the object reaches the ground in 3.80s, what is the objects initial velocity?

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

The magnets would be | n s | and | s n|

This is the answer: body 1 + engine 2