Calculate the kinetic energy of a body of mass $10 k g$ moving with a velocity $2 m s^{- 1}$ .

40 J

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20 J

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30 J

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10 J

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Solution

The correct option is B $20 J$
Mass = 10kg, Velocity = 2m/s
K.E = $\frac{1}{2}$ mv $^{2}$

= $\frac{1}{2}$ $$ 10 $$ 2 $^{2}$

= 20J

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Calculate the kinetic energy of a body of mass 10kg moving with a velocity 2ms−1.

The correct option is B 20JMass = 10kg, Velocity = 2m/sK.E = 12mv2 = 12 ∗ 10 ∗ 22 = 20J

Calculate the kinetic energy of a body of mass $10 k g$ moving with a velocity $2 m s^{- 1}$ .

The correct option is B $20 J$
Mass = 10kg, Velocity = 2m/s
K.E = $\frac{1}{2}$ mv $^{2}$

= $\frac{1}{2}$ $$ 10 $$ 2 $^{2}$

= 20J