Question

the engine of a car exerts a force of 600N in moving the car 1.0km in 150 seconds. What is the average output power of the engine

Answer 1

Power = Force × Velocity
= 600 N × (1.0 × 10³ m / 150 s)
= 4000 watts
= 4 kilowatts

∴ Power Output of engine is 4 kilowatts

Answer 2

Given:

• Force exerted by engine = 600 N.
• Displacement is 1 km.
• Time taken is 150 seconds.

To find:

• Power output of engine ?

Calculation:

Power is defined as the rate of doing work .

• In other words, power is calculated as work divided by time.

$Power = \dfrac{Work}{time}$

$\implies Power = \dfrac{force \times displacement}{time}$

• Putting necessary values in SI Unit:

$\implies Power = \dfrac{600 \times 1000}{150}$

$\implies Power = 4000 \: watt$

$\implies Power = 4\: kilowatt$

So, power output is 4 kilo-watt.