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A body of mass $0.5 kg$ is moving with a speed of $20 m / s$ . The kinetic energy of the body is [[1]] $J$ .

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Detailed Solution

A body of mass

0.5 kg

is moving with a speed of

20 m / s

. The kinetic energy of the body is

100 J

.
Given,
Mass of body,

m = 0.5 kg

Speed of body,

v = 20 m / s

The energy a body contains due to its motion state is called the kinetic energy of the body. The kinetic energy depends on the body's mass and the velocity with which the body is moving. Kinetic energy is measured in Joules (

J

).
So, kinetic energy,

K = \frac{1}{2} m v^{2}

Putting the values in above equation, we get

K = \frac{1}{2} \times 0.5 \times 20 \times 20

\Rightarrow K = 100 J

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