Answer:
Check below for answers and explanations.
At the maximum height, KE = 0 J
As the object returns, KE = PE = 500J
Explanation:
At the maximum height, the object momentarily stops, which means that the velocity at the maximum height is zero, i.e. v = 0
Since Kinetic Energy is give by:
KE = 0.5 mv^2
KE = 0.5 * 2 * 0
KE = 0 ( at Max height)
However at the peak, the PE = mgh
PE = 2 *9.8 * 25.51
PE = 500 J
As the object returns back to the ground, the Potential Energy is transformed to kinetic energy, which means that, KE = PE = 500J
