[填空题]
A certain type of automobile can acc va:a 0zqj -pwi.a14 j)czpich+p+9ej elerate approximately as showxyi dt)*+n uhc: b))qbn in the velocity–time graph of Fibcn:) hyq+idu )t *xb)g. 2–35. (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
