Question

A body of mass 4 kg is moving with a speed of 10 m/s. Find it's kinetic energy.​

Answer 1

${\huge{\underbrace{\rm{Question}}}}$

A body of mass 4 kg is moving with a speed of 10 m/s. Find it's kinetic energy.

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Given:

• Mass of the body ( m ) = 4 kg
• Velocity ( v ) = 10 m/s

To find:

Find it's kinetic energy.

Solution:

Mass = 4 kg

Velocity = 10 m/s

We know that,

$\boxed{\bf{\red{Kinetic\:energy=\dfrac{1}{2}mv^{2}}}}$

Where,

• m = mass of the body
• v = velocity of the body

.°. Kinetic energy of the body $\sf{\implies \dfrac{1}{2}mv^{2}}$

$\sf{\implies \dfrac{1}{2}×4×(10)^{2}}$

$\sf{\implies \dfrac{1}{2}×4×10×10}$

$\sf{\implies 200\:\:joules}$

Therefore,the kinetic energy of the body is 200 joules .

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Answer 2

200 joule is right answer

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