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Question

A car moves at a speed of 40km/h, It is stopped by applying brakes which produces a uniform acceleration of -0.6m/s2. How much distance will the vehicle move before coming to stop? [3 Marks]

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Solution

Given:
u = 40 km/h = 11.11 m/s ,
a = -0.6m/s2,
v=0

From 3rd equation of motion:
v2 = u2 + 2as [1 Mark]
0 = 11.112 - 2 * 0.6 * s
s = 102.87 m [2 Marks]

Hence, the car will move a distance of 102.87 metres before coming to stop.

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