Question

The bob of a simple pendulum is given a velocity 10m/s at its lowest point. Mass of the bob is 1kg and string length is 1 m.

Column I	Column II
(A) Minimum tension in string (in Newton)	(p) 50
(B) Magnitude of acceleration of bob when the string is horizontal (in m/s2)	(q) 60
(C) Minimum magnitude of acceleration of bob (in m/s2)	(r) zero
(D) Tangential acceleration at the highest point (in m/s2)	(s) 10\(\sqrt{65}\)

Answer 1

A → p;  B → s;  C → q;  D → r

Energy at point A = 1/2 mv_A² (point A is assumed to be ground)

When string is horizontal i.e. at point B;

Answer 2

A → p; 

B → s; 

C → q; 

D → r