Question

calculate the kinetic energy of body of mass 2kg has momentum 2kg m/s

Answer 1

Momentum = mass x velocity
mass = 2 kg
momentum = 2 N/s

Velocity = momentum/mass
             = 2/2
             = 1 m/s

Kinetic energy = 1/2 mv²
                        = 1/2 × 2 × 1²
                        = 1 Joule 


Kinetic energy  of the body = 1 J

Answer 2

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ANSWER :

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The mass of the object, m = 2 kg

The momentum of the object, p = 2 kg m/s

The Kinetic Energy, K.E = ?

We know that ,

$kinetic \: energy = \frac{p {}^{2} }{2m}$

From this ,,,

Kinetic Energy ,K.E = (2)^2/ 2 × 2

K.E = 4/4

K.E = 1 J

The Kinetic Energy is 1 J.

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