Define watt. Express kilowatt in terms of joule per second. A 200 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 m s^–1?

Question

Define watt. Express kilowatt in terms of joule per second. A 200 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 m s &#x2013;1 ?

Philoid · Accepted Answer

One watt is the power of work done per unit time.

1 P = 1 J / 1 s .

1 kilowatt = 1000 J s^–1

For 1 Kg power developed = 500W

Total Power for 200 kg = 200 × 500 = 1 × 10⁴ W

Velocity of the car = 20m/s

Define watt. Express kilowatt in terms of joule per second. A 200 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 m s–1?

Define watt. Express kilowatt in terms of joule per second. A 200 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 m s^–1?