Question

Which of the following must be known in order to determine the power output of an automobile?

• A. Final velocity and height
• B. Mass and amount of work performed
• C. Force exerted and distance of motion
• D. Work performed and elapsed time of work

Hint:

Power is the rate of doing work, so it depends on work done and time elapsed.

Answer 1

The Correct Option is D

Step 1: Power Formula.
Power is defined as the rate at which work is done: \[ P = \frac{W}{t} \] where \( W \) is the work done and \( t \) is the time taken.

Step 2: Determine the correct parameters.
To determine the power output of an automobile, we need to know how much work is performed and the time it takes to perform that work. Thus, the correct answer is (4).