Question

Amount of work done to accelerate 1000kg car from 20m/s to 30m/s in 1sec is?

Answer 1

@Mashy

Answer 2

The time is irrelevant here

Work done = energy expended

the KE of the car is 0.5mv^2

The change of KE = work done
\[\frac{ 1 }{ 2 }m(v _{2}^{2}-v _{1}^{2})\]

Answer 3

thanks