Motor Efficiency | MCQs

Explanation

Power (P) is defined as the rate at which work is done or energy is transferred. The formula to calculate power is:

P = W / t

Where:

W = work done (in Joules)

t = time (in seconds)

First, we need to calculate the work done (W) by multiplying the force (F) by the displacement (d):

W = F × d

= 2.0 N × 1.0 m ( converted 100 cm to 1.0 m)

= 2.0 J

Now, we can calculate the power output (P) by dividing the work done (W) by the time (t):

P = W / t

= 2.0 J / 4 s

= 0.5 W

So, the power output of the motor is 0.5 W.