[填空题]
A certain type of automobile can accelerate approxb. wvnw- a1lw* 7j1ivcimately as shown in the vmj8z7- b -cg,eh d s/n0d+h1 ixv(j6-wuwogsuelocity–time graph of Fig. 2–35.u, vwge is0-jc6 +bm on-8zd(/gudhs1jw7xh- (The short flat spots in the curve represent shifting of the gears.)
(a) Estimate the average acceleration of the car in second gear and in fourth gear. The average acceleration in $2^{nd}$ gear is given by $m/s^2$ The average acceleration in $4^{th}$ gear is given by $m/s^2$
(b) Estimate how far the car traveled while in fourth gear. m
