A body thrown from the surface of the earth vertically upward, at the initial moment of time had a kinetic energy of 500 J

A body thrown from the surface of the earth vertically upward, at the initial moment of time had a kinetic energy of 500 J. Determine what potential energy it will have when its kinetic energy is 200 J. Neglect the air resistance.

To find the value of the potential energy under the given conditions, we apply the law of conservation of energy: Ek0 = En1 + Ek1, whence we express: En1 = Ek0 – Ek1.

Values of variables: Ek0 – kinetic energy at the initial moment of time (Ek0 = 500 J); Ek1 – considered kinetic energy (Ek1 = 200 J).

Calculation: En1 = Ek0 – Ek1 = 500 – 200 = 300 J.

Answer: The potential energy of the thrown body will be equal to 300 J.