Question

A force of 10 N moves a body with a constant velocity of 2m/s. Calculate the power of the body

Answer 1

Force = mass*acceleration

10N = Mass*2m/s

Mass= 5kg

Work done = Kinetic Energy

= 1/2 mv^2

= (1/2×5×2)joules

= 5 J

Hence, the work done is 5J

Answer 2

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Given,
Force F = 10 N
Velocity V = 2 m/s

We have,
$Power\: P = \overrightarrow{F}.\overrightarrow{V}$

$\implies P = F×V$

Power = 10N × 2m/s = 20 N-m/s = 20 Watts

Therefore,
Power of the body is 20 Watts