Question

A body of mass 50 kg is moving with a speed of 20m/s. Find its kinetic Energy ​

Answer 1

Answer:

formula =½mv²

therefore the answer is 10000

Answer 2

Explanation:

$\rule{300}{2}$

Given : We are given that a body of mass 50 kg is moving with a speed of 20 m/s. We need to find the kinetic energy possessed by the body.

We know that, kinetic energy is the energy that is possessed by a body on virtue of its motion.

In order to solve this question, we will use the basic formula to find the kinetic energy.

Formula to find kinetic energy is given by,

${\sf{\longrightarrow K.E\ =\ \dfrac{1}{2}mv^2}}$

The kinetic energy possessed by a body is directly proportional to the mass and the square of its velocity.

• where K.E is the kinetic energy possessed by the body.
• m is the mass of the body.
• v is the velocity of the body.

Here,

• m = 50 kg
• v = 20 m/s

Substitute the respective values,

$\quad \quad \quad{\longrightarrow{\sf{K.E\ =\ \dfrac{1}{2}mv^2}}} \\ \\ \quad \quad {\longrightarrow{\sf{K.E\ =\ \dfrac{1}{2} \times 50 \times (20)^2}}} \\ \\ \quad \quad{\longrightarrow{\sf{K.E\ =\ \dfrac{1}{\cancel2} \times \cancel{50} \times 400}}} \\ \\ \quad \quad {\longrightarrow{\sf{K.E\ =\ 25 \times 400}}} \\ \\ \quad \quad {\longrightarrow {\underline{\underline{\sf{\red{K.E\ =\ 10,000\ J}}}}}}$

$\rule{300}{2}$