Simple Pendulum and String Question: Introduction Physics?

[ARao]

A long string attached to a mass M forms a simple pendulum. The string, however, is likely to break at some point in the oscillation if you let it swing. You pull the mass back and start it oscillating. At what point in the cycle is the string most likely to break?

1. It is equally likely to break at all positions.
2. Just after release.
3. Just when the mass passes through the point where the string is vertical.
4. Just after the mass returns to the starting point.
5. Just after the mass turns around to return.

 

[Abhisaar]

3. Because at the lowermost point,the GPE changes to KE and at that point the bob has greatest velocity, the combined effects of centrifugal force and gravitational force act radially outwards, inc. the prob. of the string breaking. At all other points only a component of mg counteracts the tension of the string.