Posted by magic 8 ball on Wednesday, October 24, 2007 at 10:13am.
A 1000kg sports car accelerates from 0 to 25m/s in 7.5s what is the average power delivered by the engine?
i know that POWER= W/delta T =Fv but im not sure how to calculate W can someone help me out with this one?

PHYSICS  drwls, Wednesday, October 24, 2007 at 12:55pm
For W, compute the increase in kinetic energy of the car during the 7.5 second interval.
W = (1/2) * 1000 kg * (25*25) m^2/s^2

PHYSICS  Dlal, Friday, March 26, 2010 at 7:28am
firet we find the K.E = 0.5*1000*25^2
the P = delta K.E over the time
the answer is 4.17*10^4 W
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