Question

find workdone in changing of car form 30m/s to 60m/s of weight 150kg​

Answer 1

Answer:

We can't find this by using w=f.s because, the informations given is not enough.

as we know that, work done ≈ energy

so, K.E=p²/2m

K.E=m²v²/2m

K.E=mv²/2 =150(60-30)/2 =150×15 = 2250 J