Question

Consider the situation of the previous problem, (a) Find the tension in the string in equilibrium, (b) Suppose the ball is slightly pushed aside and released. Find the time period of the small oscillations.

Answer 1

(a) Tension in the string in Equilibrium
T cos60° = mg

=> T = cos60^º = (10 x 10^-3 x 10)/(1/2) = 10^-1 x 2 = 0.20N

(b) Straingtening the same figure.
Now the resultant for ‘R’
Induces the acceleration in the pendulum.