小车做匀变速直线运动,B点速度等于AC段平均速度,为:
v B =
.
v AC =
AB+BC
2T =
(1.20+1.60)×1 0 -2 m
2×0.1s =0.140m/s ;
计数点B、D对应的时间内小车平均速度的大小为:
.
v BD =
BC+CD
2T =
(1.60+2.00)×1 0 -2 m
2×0.1s =0.180m/s;
故答案为:0.140,0.180.
小车做匀变速直线运动,B点速度等于AC段平均速度,为:
v B =
.
v AC =
AB+BC
2T =
(1.20+1.60)×1 0 -2 m
2×0.1s =0.140m/s ;
计数点B、D对应的时间内小车平均速度的大小为:
.
v BD =
BC+CD
2T =
(1.60+2.00)×1 0 -2 m
2×0.1s =0.180m/s;
故答案为:0.140,0.180.