[填空题]
A certain type of automobile can accelerate approximz2e vt75/bq/imm ps hth2w/1sately as shown in , 2v+rc*8hhey uh6gdlr5b kwbxy 3l31 the velocity–time graph of Fig. 2–35. (The short flat spots in the curve represw r+6hey23d blbkg51rl uy3vxch,8h *ent 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