Motion in a Vertical Circle NEET Questions

Physics - Work, Energy, and Power

Motion in a Vertical Circle MCQ Questions


7.
A particle tied to a string describes a vertical circular motion. The tension in the string is maximum at:

NEET - 2017

A.
The highest point
B.
The lowest point
C.
The mid-point
D.
All points have the same tension
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ANSWER :
B. The lowest point
8.
If the connecting string is cut at the topmost point C of a vertical circle (velocity is horizontal), the bob will:
A.
Fall vertically downward
B.
Move upward
C.
Execute projectile motion akin to a rock kicked horizontally from a cliff
D.
Come to rest at C
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ANSWER :
C. Execute projectile motion akin to a rock kicked horizontally from a cliff
9.
For minimum launch speed vā‚€ = āˆš(5gL) at the bottom, the total mechanical energy of the bob at any point is:
A.
mgL
B.
2mgL
C.
5mgL/2
D.
3mgL
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ANSWER :
C. 5mgL/2
10.
At the lowest point A of a vertical circular path (string length L), the tension TA in the string when vā‚€ = āˆš(5gL) is:
A.
mg
B.
3mg
C.
5mg
D.
6mg
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ANSWER :
D. 6mg
11.
At the topmost point C of a vertical circle (string length L, minimum vā‚€), the tension TC is:
A.
mg
B.
0
C.
3mg
D.
5mg
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ANSWER :
B. 0
12.
The tension in the string at point B (horizontal position, height L, string length L) for minimum launch speed vā‚€ = āˆš(5gL) is:
A.
mg
B.
2mg
C.
3mg
D.
0
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ANSWER :
C. 3mg