A stone of mass 'm' tied to the end of a string is revolved in a vertical circle of radius R. The net forces at the lowest and the highest points of the circle directed vertically downwards are: (Choose the correct alternative)
| Lowest point |
Highest point |
| (a) mg - T1 |
mg + T2 |
| (b) mg + T1 |
mg - T2 |
| (c) mg + T1 - (mv12)/R |
mg - T2 + (mv12)/R |
| (d) mg - T1 - (mv12)/R |
mg + T2 + (mv12)/R |
T1 and v1 denote the tension and speed at the lowest point. T2 and v2 denote corresponding values at the highest point
