Motion in a Vertical Circle NEET Questions

Physics - Work, Energy, and Power

Motion in a Vertical Circle MCQ Questions


13.
For a bob to just complete the vertical circle, what is the minimum tension at the bottom of the circle?
A.
mg
B.
3mg
C.
5mg
D.
6mg
😑 View Answer Rough Work Error
ANSWER :
D. 6mg
14.
The minimum kinetic energy at the topmost point C of a vertical circle of radius L (for the bob to just complete the circle) is:
A.
mgL
B.
mgL/2
C.
2mgL
D.
5mgL/2
😑 View Answer Rough Work Error
ANSWER :
B. mgL/2
15.
A stone of mass m is tied to a string of length L and whirled in a vertical circle. The difference in tension at the lowest and highest points is:
A.
2mg
B.
4mg
C.
6mg
D.
mg
😑 View Answer Rough Work Error
ANSWER :
C. 6mg
16.
For a vertical circular motion, the centripetal acceleration at the topmost point (minimum speed condition) is:
A.
g/2
B.
g
C.
2g
D.
5g
😑 View Answer Rough Work Error
ANSWER :
B. g
17.
A ball on a string of length L is given speed vâ‚€ at the bottom. The ball reaches the top (height 2L) with speed vC. The correct energy equation is:
A.
½mv₀² = ½mvC²
B.
½mv₀² + 2mgL = ½mvC²
C.
½mv₀² = ½mvC² + 2mgL
D.
mv₀² = mvC² + 2gL
😑 View Answer Rough Work Error
ANSWER :
C. ½mv₀² = ½mvC² + 2mgL
18.
Why does the tension in the string do no work on the bob during circular motion?
A.
Tension is always zero
B.
Tension is always perpendicular to the displacement (velocity) of the bob
C.
Tension equals gravity at all points
D.
The bob moves with constant speed
😑 View Answer Rough Work Error
ANSWER :
B. Tension is always perpendicular to the displacement (velocity) of the bob