Question

A body of mass of $60kg$ Is, moving with a speed of $50m{s}^{-1}$. Find its kinetic energy.

Answer 1

Step 1: Given data

1. Mass of the body, m = 60 kg.
2. Speed of the body, v = 50 m/s.

Step 2: Kinetic energy

1. The total amount of work done to move a body from one place to another is called kinetic energy.
2. Kinetic energy, $E_k=\frac{1}{2}m{v}^2$, where m is the mass of the body and v is the speed of the body.
3. For a rested body, kinetic energy is zero.

Step 3: Finding the kinetic energy

Let $E_k$ be the kinetic energy of the body.

Now,

$E_k=\frac{1}{2}\times 60\times {\left(50\right)}^2=75000$

$\Rightarrow E_k=75000J$

The kinetic energy of the body is 75000 J.