Question

A body of mass 60gm is moving with speed 50m/s. Find its kinetic energy

Answer 1

the kinetic energy of a body having mass 60 kg moving with speed of 50 m/s will be 75,000 Joule.

Answer 2

Given :-

Mass of the body = 60 gm

Speed of the body moving = 50 m/s

To Find :-

The kinetic energy of the body.

Analysis :-

Here we are given with the mass and speed of the body.

Substitute the given value in the question using it's respective formula of kinetic energy and find it accordingly.

Solution :-

We know that,

• m = Mass
• KE = Kinetic energy
• v = Speed

Using the formula,

$\underline{\boxed{\sf Kinetic \ energy=\dfrac{1}{2} mv^2}}$

Given that,

Mass (m) = 60 gm

Speed (v) = 50 m/s

Substituting their values,

⇒ KE = 1/2 × 60 × (50)²

⇒ KE = 1/2 × 60 × 2500

⇒ KE = 2500 × 60 / 2

⇒ KE = 150000/2

⇒ KE = 75000 J = 7.5 × 10⁴

Therefore, the kinetic energy of the moving body is 7.5 × 10⁴.