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Question

A car decreases its speed from 80 km/h to 60 km/h in 5 seconds. The acceleration of the car is:


A

-1.11 m/s2

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B

1.12 m/s2

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C

-1.14 m/s2

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D

1.11 m/s2

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Solution

The correct option is A

-1.11 m/s2


Here,

u = 80 km/h = 22.22 m/s

v = 60 km/h = 16.67 m/s

t = 5s

Using, a = v ut

a = 16.67 22.225 m/s2

a = - 1.11 m/s2


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