A car of mass 1250 kg,can reach the 60 mph (=26.8 m/s)mark in 5.25 seconds.What is the average power needed to accomplish this?

Question

Quizplus · Accepted Answer

To find the average power needed, we can use the formula:
Power = Work / Time

First, let's find the work done by the car to reach the speed of 26.8 m/s.
We can use the formula:
Work = (1/2) x Mass x Velocity^2

Work = (1/2) x 1250 kg x (26.8 m/s)^2
Work = 450,050 J

Next, let's find the time taken to reach this speed:
Time = 5.25 s

Now, let's calculate the average power needed:
Power = Work / Time
Power = 450,050 J / 5.25 s
Power = 85.5 kW

Therefore, the correct answer is B) 85.5 kW.

A Car of Mass 1250 Kg,can Reach the 60 Mph