A rock falls off a cliff for 5 seconds, How hign was UE Ca Hint Assume gravity or acceleration to be 9.81 m/s2 and the initial velocity to be zero
Use equation AY Vt+2 att

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?