Asked by Allison

A car's engine can accelerate a car from rest to 30 m/s in 6 s. if the car's mass is 1300 kg, what is the power of the engine?

can someone give me the answer because i just want to verify it with my own?
thank you!
Answered by Allison
the answer i got is 288600W
Answered by bobpursley
power= work/time= 1/2 m v^2 / tune

I don't get that result.
Answered by Allison
can you tell me exactly what you did instead of just giving me the formula?

please and thank you
Answered by CANTIUS
To expand upon bobpursley's solution:
P = W/t =(1/2 m v^2)/t = (m v^2)/(2t)
m = 1300 kg, v = 30 m/s, t = 6 s
The work is equal to the change in kinetic energy, which, since it started from rest, is simply (1/2) m v^2
The formula given is the definition of power.
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