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When a train starting from rest is unifo...

When a train starting from rest is uniformly accelerating, a plumb bob hanging from the roof of a compartment is found to be inclined at an angle of `45^(@)` with the vertical. The time taken by the train to travel a distance of `1//2km` will be nearly

A

7s

B

10s

C

15s

D

25s

Text Solution

Verified by Experts

The correct Answer is:
B
`a cos theta=g sin theta, s=ut+(1)/(2)at^(2)`
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NARAYNA-LAW OF MOTION-EXERCISE - II (H.W)(OBJECTS SUSPENDED BY STRINGS AND APPARENT WEIGHT)
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  2. A block of mass m is pulled by a uniform chain of mass m tied to it by...

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  3. Two masses of 8 kg and 4 kg are connected by a string as shown in figu...

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  4. Consider the system shown in figure. The pulley and the string are lig...

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  5. In the figure, a smooth pulley of negligible weight is suspended by a ...

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  6. A chain consisting of 5 links each of mass 0.1 kg is lifted vertically...

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  7. Three blocks of equal masses (each 3kg) are suspended by weightless st...

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  8. Pulleys and strings are massless. The horizontal surface is smooth. Wh...

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  9. When a train starting from rest is uniformly accelerating, a plumb bob...

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  10. The pulley and strings shown in the figure are smooth and of negligibl...

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  11. Two bodies of masses 4kg and 6kg are attached to the ends of a string ...

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  12. Acceleration of block m is (theta lt 45^(@))

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  13. A stationary shell breaks into three fragments. The momentum of two of...

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  14. An object initially at rest explodes, disintegrating into 3 parts of e...

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  15. A man of 50 kg is standing at one end on a boat of length 25m and mass...

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  16. A stationary body of mass 3 kg explodes into three equal pieces. Two o...

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