What is the power of engine that pulls a 1000 kg automobile at a steady speed of 10 m/sec along a level road?
in the absence of any friction, no power needed.
P is N-m/s
N = Force = ma
no acceleration, no force, no work, no power.
you have to have some measure of friction? (both air, wind, and road, and tire)
To determine the power of the engine that is pulling the automobile, we need to use the formula:
Power = Force × Velocity
In this case, we have the mass of the automobile (m = 1000 kg) and the velocity (v = 10 m/s). However, force is not provided directly, so we need to calculate the force acting on the automobile first.
Force can be determined using Newton's second law of motion, which states:
Force = Mass × Acceleration
Since the automobile is moving at a steady speed along a level road, it has zero acceleration. Therefore, the force required to maintain the steady motion is equal to zero.
Since there is no force acting directly upon it, the power of the engine required to maintain the steady speed of the automobile is also zero.