Question

A car is traveling at 10m/s before it increases its speed to 30m/s for 120m. How long does it take to do this ?

Answer 1

60 seconds

Step-by-step explanation:

Given:

v₀ = 10 m/s

v = 30 m/s

Δx = 120 m

Find: t

Δx = ½ (v + v₀)t

120 = ½ (30 + 10) t

t = 60

It takes 60 seconds.