Question

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

A
40J
B
20J
C
30J
D
10J

Solution

## The correct option is B $$20 J$$Mass = 10kg, Velocity = 2m/sK.E = $$\dfrac{1}{2}$$mv$$^{2}$$                   = $$\dfrac{1}{2}$$ $$\ast$$ 10 $$\ast$$ 2$$^{2}$$                   = 20JPhysics

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