Question

How long does it take for a particle to move with initial velocity 80km/hr to 100km/hr in 100m​

Answer 1

4 s

Step-by-step explanation:

Given:

v₀ = 80 km/hr = 22.2 m/s

v = 100 km/hr = 27.8 m/s

Δx = 100 m

Find: t

Δx = ½ (v + v₀) t

(100 m) = ½ (27.8 m/s + 22.2 m/s) t

t = 4 s