I obtained a slighty different answer. Can anyone kindly verify where I am going wrong? The question is stated thus:
A simple pendulum is of length 0.5m and the bob has mass 0.25kg. Find the greatest value for the tension in the string when the pendulum is set in oscillation by drawing the bob to one side through an angle of 5 degrees and releasing from rest. Explain where in the cycle the tension is greatest.
Te relationship for centripetal force involved is
T-mg = mv^2/r
Resolving the tension in the string into its components,
Tcos theta = mg
Tsin theta =mv^2/r
Dividing the above, we obtain
tan theta =v^2/gr
So, v^2 = gr tan theta
I substituted this value and other values for mass and g. I obtained 2.7N as my final answer. But it appears to be 2.5N. Any clarification will be appreciated. Thanks.