Motion in a Vertical Circle NEET Questions

Physics - Work, Energy, and Power

Motion in a Vertical Circle MCQ Questions


13.
What is the work done by the centripetal force in a complete revolution of vertical circular motion?
A.
Zero
B.
Positive
C.
Negative
D.
Infinity
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ANSWER :
C. Negative
14.
If the tension in the string is zero at the highest point, what is the speed of the object at that point?
A.
√(gR)
B.
√(2gR)
C.
√(3gR)
D.
Zero
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ANSWER :
B. √(2gR)
15.
A body is moving in a vertical circle. At the highest point, the net force acting on it is:
A.
mg
B.
2mg
C.
3mg
D.
Zero
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ANSWER :
C. 3mg
16.
The total mechanical energy in a vertical circular motion remains:
A.
Constant
B.
Increases
C.
Decreases
D.
Oscillates
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ANSWER :
A. Constant
17.
A mass m tied to a string is given just enough velocity to complete a vertical circle. What is the tension in the string at the lowest point?
A.
6mg
B.
2mg
C.
4mg
D.
mg
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ANSWER :
A. 6mg
18.
If the speed of a particle in a vertical circular motion is doubled, what happens to the tension at the lowest point?
A.
Quadruples
B.
Doubles
C.
Halves
D.
Remains the same
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ANSWER :
B. Doubles