At highway speeds, a particular automobile is capable of an acceleration of abou

Question

At highway speeds, a particular automobile is capable of an acceleration of about 1.4 m/s2 .

Part A

At this rate, how long does it take to accelerate from 60 km/h to 130 km/h?

Express your answer to two significant figures and include the appropriate units.

At highway speeds, a particular automobile is capable of an acceleration of about 1.4 m/s2 .

Part A

At this rate, how long does it take to accelerate from 60 km/h to 130 km/h?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Vf = final speed = 130 km/h = 36.11 m/s

Vo = initial speed = 60 km/h = 16.67 m/s

a = acceleration = 1.4

t = time taken

using the equation

Vf = Vo + at

36.11 = 16.67 + 1.4 t

t = 13.886 sec

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