Question

Find the velocity of a body of mass 2kg having a kinetic energy of 20j

Answer 1

KE =1/2mv²

20=1/2*2*v²

V²=20

V=2√5 m/s

Answer 2

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ANSWER :

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The mass of the object, m = 2 kg

The speed of the object, v = ?

The Kinetic Energy, K.E = 20 J

We know that ,

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

From this ,,,

Kinetic Energy ,K.E = 1/2 × 2 × (v)^2

20 = ( v)^2

v = 2 (5)1/2m/s

The Kinetic Energy is 2 (5)1/2 m/s

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