39.4k views
3 votes
What is the power required (in Watts) to move a 2000.0 kg car at 10.0 m/s for 1 minute? Give units!

User Aq
by
7.2k points

1 Answer

1 vote

Final answer:

To move a car at a constant velocity, theoretically, no power is required. In practical terms, power is used to counteract friction and air resistance, but since these values are not given, we cannot calculate the required power. For a given resistive force, power could be calculated as P = Fv, but this situation does not provide the needed information.

Step-by-step explanation:

To calculate the power required to move a 2000.0 kg car at 10.0 m/s for 1 minute, we must first understand that power is the rate at which work is done. Since the car is traveling at a constant velocity, it's not accelerating, and we assume there's no friction or air resistance, there's no net work being done on the car. Consequently, the engine's power goes into counteracting frictional forces (which we're neglecting). In a vacuum or ideal scenario with no air resistance or friction, the power required to maintain a constant velocity would be zero. However, since we're ignoring these factors, no specific power calculation is required. Realistically, to maintain a speed of 10.0 m/s, an engine must compensate for these resistive forces, but this value is not provided or calculable from the information given.

If we had a situation where we knew the external forces (like drag, rolling resistance, etc.), the power to maintain that constant speed could be calculated using P = Fv, where P is power, F is the force of resistance, and v is velocity.

User Tim Delaney
by
7.8k points

No related questions found