As an object falls to the ground, what happens to its energy? Ignore air resistance in this scenario. A)energy is converted from gravitational potential energy to kinetic energy.

B)energy is converted from kinetic energy to
gravitational potential energy.

C)energy is in motion the whole time.

D)energy gets destroyed due to friction

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s