castrofiori 07/03/2016 Vm(total) = Δs_total/Δt_totalv1 = 40km/hv2 = 69km/ht1 = 3ht2 = 1hΔs1 = v1*t1 Δs2 = v2*t2Δs1 = 40*3 = 120kmΔs2 = 69*1 = 69kmΔs_total = 120 + 69 = 189kmΔt_total = 3+ 1 = 4hvm(total) = 189/4vm(total) = 47,25km/h
castrofiori
Vm(total) = Δs_total/Δt_total
v1 = 40km/h
v2 = 69km/h
t1 = 3h
t2 = 1h
Δs1 = v1*t1
Δs2 = v2*t2
Δs1 = 40*3 = 120km
Δs2 = 69*1 = 69km
Δs_total = 120 + 69 = 189km
Δt_total = 3+ 1 = 4h
vm(total) = 189/4
vm(total) = 47,25km/h