Sir, can I use angle=arc length/radius formula to the following sum? If not, why? Can u plz explain sir?

When pendulum of length 50cm oscillates, it produces an arc of 16cm. The angle so formed in degree measure is (approx)

Question

Sir, can I use angle=arc length/radius formula to the following sum? If not, why? Can u plz explain sir?

When pendulum of length 50cm oscillates, it produces an arc of 16cm. The angle so formed in degree measure is (approx)

Akhil Tanakala · Accepted Answer

Yes. You can use that formula.
Angle subtended= Arc length/radius
=(360/2πr)*16
=(360/2π50)*16
= 18°35''