[填空题]
Estimate the average acceleration of the car in lih50.zvxx;c i.dvia/e bf 7 5the previous Problem (Fig. 2–35)d./ lii viec5.za7xvb5x;fh 0zh ttq780+qop when it is i +pqo80qzht7tn
(a) first, $m/s^2$
(b) third, $m/s^2$
(c) fifth gear. $m/s^2$
(d) What is its average acceleration through the first four gears? $m/s^2$