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Question

The acceleration of a car that speeds up from 12 meters per second to 30 meters per second in 15 seconds-


A

2.4m/s2

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B

1.2m/s2

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C

2m/s2

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D

5.2m/s2

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Solution

The correct option is B

1.2m/s2


Step 1: Given data,

As per the data given,

Initial velocity, u=12m/s

Final velocity,v=30m/s

Time taken, t=15s

Step 2: To calculate the acceleration of the car,

We know that, according to the first equation of motion,

v=u+at

Here v is final velocity and u is initial velocity and a is acceleration and t is time.

After substituting the values-

30=12+a×15

15a=30-12=18

a=1815=1.2m/s2

Thus, the acceleration of the car is 1.2m/s2.

Hence, option B is the correct answer.


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