11. An engine develops a power of 750W while moving a car at constant velocity 3m/s. the force exerted on the car by the engine is (a) 83.3N (b) 250N (c) 750N (d) 2250N
The power developed by the engine is given as 750W and the velocity of the car is given as 3m/s. The power developed by an engine can be expressed as the product of force and velocity.
Power = Force × Velocity
Rearranging the equation:
Force = Power / Velocity
Substituting the given values:
Force = 750W / 3m/s
Simplifying:
Force = 250N
Therefore, the force exerted on the car by the engine is (b) 250N.