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Third Equation of Motion

A car starts ...

Question

A car starts from rest . It moves with uniform acceleration. In 10sec it attains a speed of 72km/h on a straight road. Find its acceleration?

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Solution

Hey there !

Initial Velocity = u = 0

Final velocity = v = 72 km/hr = 72 x 5/18 = 20 m/s

Time = t = 10 sec

Acceleration = a

Equation of motion :-

v = u + at
20 = 0 + 10a

a = 20/10

a = 2 m/s²

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