Question

A mass of 2000 kg is raised 5 m in 10 seconds. What is the kinetic energy of the mass at that height?

Answer 1

Answer;

98,000 joules

Explanation;

Kinetic is the energy possessed by a body in motion; while kinetic energy is the energy possessed by a body while at rest.

Potential energy is given by; mgh, where m is the mass, g the gravity, 9.8 m/s² and h is the height.

Energy can be transformed from one form to another and can neither be created or destroyed.

Therefore;

Potential energy = 2000 × 5 × 9.8

                            = 98,000 joules

Therefore, the kinetic energy will still be 98,000 joules, when the body is in motion.