A pendulum bob is projected form its lowest position with velocity (u), in horizontal direction, that is just enough to make the string horizontal (position OC). At angular position q, at point B, the speed (V) of the bob was observed to be half its initial projection speed (u).

(a) Find `theta`
(b) Plot variation of magnitude of tangential acceleration of `theta`. (c) Let travel time from A to B be `t_(1)` and that from B to C be `t_(2)`. Looking at the graph obtained in part (b), tell which is larger `-t_(1)` or `t_(2)` ?

Answer

(a) `theta =cos^(-1)(1/4)`
`(##IJA_PHY_V01_C04_E01_073_S01##)`
(c) `t_(1) gt t_(2)`