Question

A car moves at a speed of 40 km/h. It is stopped by applying brake which produces a uniform acceleration of -0.5m/s. How much distance does the vehicle move before coming to stop?​

Answer 1

123 m

Step-by-step explanation:

Given:

u = 40 km/h = 11.1 m/s

v = 0 m/s

a = -0.5 m/s²

Find: s

Note: You will need an equation independent of time.

v² = u² + 2as

(0 m/s)² = (11.1 m/s)² + 2 (-0.5 m/s²) s

s = 123 m