If, in Exercise 5.21, the speed of the stone is increased beyond the maximum permissible value, and the string breaks suddenly, which of the following correctly describes the trajectory of the stone after the string breaks:
A. the stone moves radially outwards,
B. the stone flies off tangentially from the instant the string breaks,
C. the stone flies off at an angle with the tangent whose magnitude depends on the speed of the particle?
If the speed of the stone is increased beyond the maximum permissible value and the string breaks suddenly, the stone will follow the path of the velocity at the instant that it breaks.
According to the first law of motion, the velocity of the stone at every point is tangential to path followed by it at that instant.
Thus, the stone will fly off tangentially the instant the string breaks.
Ans: B.