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A car accelerates from rest at constant ...

A car accelerates from rest at constant rate of `2ms^(-2)` for some time. Immediately after this, it retards at a constant rate of `4ms^(-2)` and comes to rest. The total time for which it remains in motion is 3 s. Taking the moment of start of motion as t = 0, answer the following questions.
If the time of acceleration is `t_(1)`, then the speed of the car at `t=t_(1)` is

A

`2t_(1)`

B

`4t_(1)`

C

`gt 2t_(1)`

D

`lt 2t_(1)`

Text Solution

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The correct Answer is:
A
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A car accelerates from rest at constant rate of 2ms^(-2) for some time. Immediately after this, it retards at a constant rate of 4ms^(-2) and comes to rest. The total time for which it remains in motion is 3 s. Taking the moment of start of motion as t = 0, answer the following questions. What is the distance travelled by it during the time of increasing speed ?

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Knowledge Check

  • A car accelerates from rest at constant rate of 2ms^(-2) for some time. Immediately after this, it retards at a constant rate of 4ms^(-2) and comes to rest. The total time for which it remains in motion is 3 s. Taking the moment of start of motion as t = 0, answer the following questions. What is the average speed of the car for the journey /

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