A 1 kg ball is thrown straight up into the air and its height is recorded every second until it reaches the ground a little more than 3 seconds later. The height of the ball above the ground is shown in the table. What is the potential energy of the ball at each time? Gravitational potential energy can be calculated by multiplying the mass, the height, and the acceleration due to gravity (9.8 m/s2). Acceleration due to gravity can be rounded to 10 m/s2.