Question

A 6.7kg object moves with a velocity of 8m/s. What's its kinetic energy?

Answer 1

Given parameters:

Mass of object = 6.7kg

Velocity  = 8m/s

Unknown parameter:

Kinetic energy  = ?

Energy is defined as the ability to do work. There are two forms of energy;

Kinetic and potential energy.

Kinetic energy is the energy due to the motion of a body. Whereas, potential energy is the energy due to the position of a body usually at rest.

Kinetic energy is mathematically expressed as;

             Kinetic energy  = $\frac{1}{2} m v^{2}$

where m is the mass of the body

           v is the velocity of the body

Since we have been given both mass and velocity, input the parameter to solve for the unknown;

            Kinetic energy  = $\frac{1}{2}$ x 6.7 x 8²   = 214.4‬J

So the kinetic energy of the body is  214.4‬J