The breaking stress of a wire depends on:
1. | material of the wire |
2. | length of the wire |
3. | radius of the wire |
4. | shape of the cross-section |
1. | \(10\) kg | 2. | \(20\) kg |
3. | \(40\) kg | 4. | \(80\) kg |
A heavy uniform rod is hanging vertically from a fixed support. It is stretched by its own weight. The diameter of the rod is:
1. | smallest at the top and gradually increases down the rod. |
2. | largest at the top and gradually decreases down the rod. |
3. | uniform everywhere. |
4. | maximum in the middle. |
A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break:
1. | when the mass is at the highest point |
2. | when the mass is at the lowest point |
3. | when the wire is horizontal |
4. | at an angle of \(\cos^{-1}(\frac{1}{3})\) from the upward vertical |