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Question

A car decreases its speed from 80 km/h to 60 km/h is 5 second. 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=80km/h=80×518=22.22ms1

v=60km/h=60×518=16.67ms1

t = 5s

Using, a = v ut

a = 16.67 22.225 m/s2

a = - 1.11 m/s2


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