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A block of mass m is suspended from a fi...

A block of mass m is suspended from a fixed support with the help of a cord. Another identical cord is attached to the bottom of the block. Which of the following statement is/are true?

A

If the lower cord is pulled suddenly, only the upper cord will break.

B

If the lower cord is pulled suddenly, only the lower cord will break.

C

If pull on the lower cord is inceased gradually, only the upper cord will break.

D

If pull on the lower cord is increased gradually, only the upper cord will break.

Text Solution

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The correct Answer is:
B, D
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ALLEN -NEWTON'S LAWS OF MOTION & FRICTION-EXERCISE (O-2)
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  2. A block of weight 9.8N is placed on a table. The table surface exerts...

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  3. A block of mass m is suspended from a fixed support with the help of a...

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  4. A block A and wedge B connected through a string as shown. The wadge B...

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  5. Two blocks A and B of mass 2 kg and 4 kg respectively are placed on a ...

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  6. A block is kept on a rough surface and applied with a horizontal force...

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  7. A block placed on a rough horizontal surface is pushed with a force F ...

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  8. A block is placed over a plank. The coefficient of friction between th...

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  9. A block is released from rest from point on a rough inclined place of ...

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  10. In the given figure both the bocks have equal mass. When the thread is...

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  11. A block of mass m is placed on a smooth horizontal floor is attached t...

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  12. A block of mass m is placed on a smooth horizontal floor is attached t...

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  13. A block of mass m is placed on a smooth horizontal floor is attached t...

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  14. When F = 2N, the frictional force between 5 kg block and ground is

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  15. When F = 2n, the frictional force between 10 kg block 5 kg block is

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  16. The maximum F which will not cause motion of any of the blocks is

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  17. The maximum acceleration of 5 of kg block is :-

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  18. The acceleration of 10 kg block when F = 30 N is

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  19. In the figure shown ,acceraltion of is x (upwards ) Acceleration o fpu...

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  20. Velocity of there particless A.B and C varies with time t as , v(A) =(...

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