升降机匀加速直线运动的位移 x 1 =
v
2 t 1 =
3
2 ×3m=4.5m
匀速运动的位移x 2=25m
减速运动位移 x 3 =
v
2 t 3 =
3
2 ×2m=3m
矿井深度h=x 1+x 2+x 3=4.5+25+4m=33.5m
答:矿井深33.5m.
升降机匀加速直线运动的位移 x 1 =
v
2 t 1 =
3
2 ×3m=4.5m
匀速运动的位移x 2=25m
减速运动位移 x 3 =
v
2 t 3 =
3
2 ×2m=3m
矿井深度h=x 1+x 2+x 3=4.5+25+4m=33.5m
答:矿井深33.5m.