Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

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.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied. true or false

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?