Motion in a Vertical Circle NEET Questions

Physics - Work, Energy, and Power

Motion in a Vertical Circle MCQ Questions


1.
A bob of mass m is suspended by a string of length L and given a horizontal velocity v₀ at the lowest point A to complete a vertical circle. The minimum value of v₀ is:
A.
√(gL)
B.
√(2gL)
C.
√(3gL)
D.
√(5gL)
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ANSWER :
D. √(5gL)
2.
For a bob completing a vertical circle (string length L), the speed at the topmost point C (with minimum launch speed) is:
A.
√(5gL)
B.
√(3gL)
C.
√(2gL)
D.
√(gL)
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ANSWER :
D. √(gL)
3.
For a bob completing a vertical circle (string length L), the speed vB at point B (the midpoint, at height L from bottom) is:
A.
√(5gL)
B.
√(3gL)
C.
√(gL)
D.
√(2gL)
😑 View Answer Rough Work Error
ANSWER :
B. √(3gL)
4.
A mass m is attached to a string and is whirled in a vertical circle. The tension in the string is least when the mass is at:

NEET - 2020

A.
The highest point
B.
The lowest point
C.
The mid-point
D.
All points have the same tension
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ANSWER :
A. The highest point
5.
The ratio of kinetic energies KB/KC at points B (height L) and C (top, height 2L) for minimum launch speed in a vertical circle is:
A.
1:3
B.
5:1
C.
3:1
D.
2:1
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ANSWER :
C. 3:1
6.
At the topmost point C of a vertical circle (minimum launch), the string becomes slack. After this, if the string is not cut, the bob will:
A.
Fall straight down
B.
Continue circular motion and complete the revolution
C.
Execute projectile motion with horizontal projection
D.
Come to rest
😑 View Answer Rough Work Error
ANSWER :
B. Continue circular motion and complete the revolution