Question

The kinetic energy of a 2kg body is 400j.find the velocity and momentum of the body.

Answer 1

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ANSWER :

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Part - 1 :

The mass of the object, m = 2 kg

The speed of the object, v = ?

The Kinetic Energy, K.E = 400J

We know that ,

$kinetic \: energy = \frac{1}{2} mv ^{2}$

From this ,,,

Kinetic Energy ,K.E = 1/2 × 2 × (v)^2

400 = v^2

v = 20 m/s

The Velocity is 20 m/s

Part - 2 :

The mass of the object, m = 2 kg

The speed of the object, v = 20 m/s

The Momentum, p = ?

We know that ,

$momentum \: p \: = mv$

From this ,,,

Momentum, p = 2 × 20

p = 40 kg m/s

The momentum of the object is 40 Kg m/s

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