A stone tied to a string of length is whirled in a vertical circle with the other end…
PHYSICS · Subjective · AP · Physics C: Mechanics · Force and Translational Dynamics · Force and Translational Dynamics
Problem
A stone tied to a string of length l is whirled in a vertical circle with the other end of the string at the centre. At a certain instant, the stone is at its lowest position and has speed u. Find the magnitude of the change in its velocity when it reaches a position where the string is horizontal.