ch08-p116 - 116. (a) The kinetic energy K of the automobile...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
116. (a) The kinetic energy K of the automobile of mass m at t = 30 s is Km v == F H G I K J F H G I K J 1 2 1 2 1500 72 1000 3600 30 10 2 2 5 kg km h mkm sh J. bg b g . (b) The average power required is P K t avg J s W. × Δ Δ 30 10 10 5 4 . . (c) Since the acceleration a is constant, the power is P = Fv = mav = ma ( at ) = ma 2 t using Eq. 2-11. By contrast, from part (b), the average power is
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online