小题1:m/s 2
小题2:4250m
小题3:3000m
(1)a 1= (2分)
a 1= m/s 2= m/s 2(1分)
(2)h 1= υ 1t 1
h 1= × 100 × 30m = 1500m (3分)
h 2= (υ 1+ υ 2)△t 2
h 2= × (100 + 240) × 25m = 4250m (3分)
(3)h 3= υ 2△t 3
h 3= × 240 × 25m = 3000m (3分)
小题1:m/s 2
小题2:4250m
小题3:3000m
(1)a 1= (2分)
a 1= m/s 2= m/s 2(1分)
(2)h 1= υ 1t 1
h 1= × 100 × 30m = 1500m (3分)
h 2= (υ 1+ υ 2)△t 2
h 2= × (100 + 240) × 25m = 4250m (3分)
(3)h 3= υ 2△t 3
h 3= × 240 × 25m = 3000m (3分)