A pendulum of length 2.0 m makes small angle oscillations with an amplitude of 15 degrees.
a) Find the time required for the bob to oscillate from 5 degrees to 10 degrees to the right.
b)Calculate the velocity and acceleration at these two positions.
ω^2 =g/l ,for small angles [not sure]
The Attempt at a Solution
I'm stuck from a ,so I only attempted a part.
ω = (10/2)^(1/2)
t = 5(pi)/180 / ω = 5(pi)/180 / (10/2)^(1/2) = 0.039 s
The answer is 0.18s which is different from mine significantly.