(2 pts. Later as the car passes through point D, its kinetic energy is 97 kJ, and its potential energy is zero. speed as a function of time is shown by the graph above. says that displacement is obtained by multiplying the average of the initial and final velocities by the time elapsed during the. As the car passes through point B, its kinetic energy is 12 kJ. What happens if the person on the cliff throws the rock straight down, instead of straight up? To explore this question, calculate the velocity of the rock when it is 5.10 m below the starting point, and has been thrown downward with an initial speed of 13.0 m/s. An object of mass 10 kg is released from rest above the surface of a. It will follow the following equations of. \( \newcommand\):Calculating Velocity of a Falling Object: A Rock Thrown Down When a body or object falls towards earth due to gravitational force of earth and without any other force acting on it. Imagine an object body is falling freely for time t seconds, with final velocity v, from a height h, due to gravity g.