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Two trains travelling on the same track ...

Two trains travelling on the same track are approaching each other with equal speed of ` 40 m//s`. The drivers of the trains beging to decelerate simultaneously when just ` 2.0 km apart. Assuming deceleration to be uniform and equal the value to the deceleration to barely avoid collision should be .

A

`0.2 m//s^(2)`

B

`0.6 m//s^(2)`

C

`0.4 m//s^(2)`

D

`0.8 m//s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D

Trains will stop in middle.
`0=(40)^(2)-2axx1000`
`a=0.8 m//s^(2)`
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CP SINGH-MOTION IN A STRAIGHT LINE-EXERCISES
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  9. In the previous question, the total distance traveled is

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  10. The engine of a motoecycle can produce a maximum acceleration of 5 m//...

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  11. A train starting from rest accelerates uniformly for 100 s, then comes...

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  12. A particle starts from rest accelerates at 2 m//s^2 for 10 s and then ...

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  13. A car , starting from rest, accelerates at the rate f through a distan...

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  14. A ball of mass m(1) and another ball of mass m(2) are dropped from equ...

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  15. The ratio of the distance through which a ball falls in the 2^(nd), 3^...

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  16. A ball is released from the top of a tower of height h meters . It tak...

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  17. A body freely falling from the rest has velocity v after it falls thro...

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  19. A stone from the top of a tower, travels 35 m in the last second of it...

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