Question

A bus and a car have the same kinetic energy. Which of the two is moving fast? Explain

Answer 1

Kinetic energy:

1. The energy possessed by an object by virtue of its motion is called kinetic energy.
2. The kinetic energy of the body of mass $m$ and velocity $v$ is given by

$$\begin{gathered} K=\frac{1}{2}m{v}^2 \\ {v}^2=\frac{2K}{m} \\ v=\sqrt{\frac{2K}{m}} \\ soforcnos\tan tkineticenergy, \\ v\alpha \frac{1}{\sqrt{m}} \end{gathered}$$

3. We can say that the higher the mass lower the velocity and vice versa.

4. As the mass of the car is less as compared to the mass of the truck, the velocity of the car is more as compared to the velocity of the truck