ch02-p091 - 91. We take +x in the direction of motion, so v...

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91. We take + x in the direction of motion, so v = F H G I K J =+ 60 1000 3600 16 7 km / h m/km s/h m/s bg . and a > 0. The location where it starts from rest ( v 0 = 0) is taken to be x 0 = 0. (a) Eq. 2-7 gives a avg = ( v v 0 )/ t where t = 5.4 s and the velocities are given above. Thus, a avg = 3.1 m/s 2 . (b) The assumption that
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