Question

A 45.0kg box is moving at 3.00m/s what is the kinetic energy of the box

Answer 1

The kinetic energy of the box is 202.5 J

Explanation:

Kinetic energy is the energy of any object when it is at motion. So kinetic energy is influenced by the velocity of the object and mass of the object.

As kinetic energy is a moving energy, so it is directly proportional to the product of mass and square of velocity of the object. It is a vector quantity.

         $K . E=\frac{1}{2} \times m \times v^{2}$

Given: m = 45 kg and v = 3 m/s

         $K \cdot E=\frac{1}{2} \times 45 \times 3^{2}=\frac{1}{2} \times 45 \times 9=\frac{405}{2}=202.5 \mathrm{J}$

So the kinetic energy of the box is 202.5 J.