Physics - W.E.P. Question with Solution | TestHub
One end of an ideal string is connected with a very small ball of mass m and the other end is connected with a fixed point O. The ball can move in vertical circle. At the lowest point, speed of ball is v.
Line connecting is horizontal, A is lowest point and C is highest point of circle.
List - I | List - II |
|---|---|
(P) | (1) At some point tension in string becomes zero. |
(Q) | (2) Tension in string never becomes zero. |
(R) | (3) Velocity becomes zero at highest point of its path. |
(S) | (4) Particle performs projectile motion for some duration. |
| (5) At the lowest point tension in string is greater than weight of ball |
Options:
Answer:
Solution:
Tension can vanish only if ; the circle completes only for .
(P) : oscillates, tension never zero; P 2,3,5
(Q) : just reaches level of O, tension zero there; Q 1,3,5
(R) : leaves circle, projectile; R 1,4,5
(S) : completes circle; S 2,5
Answer: C
