Question

a simple pendulum with the length of 2.08m oscillates. the acceleration of gravity is 9.8 m/s^2.how many complete oscillations does the pendulum make in 3.75 min?

Answer 1

Get the period P from:

P = sqrt(L/g)

Then compute (225 seconds)/P

That will be the number of oscillations.

Answer 2

27. A simple pendulum makes 120 complete oscillations in 3.00 min at a location where g= 9.80 m/s2. Find (a) the period of the pendulum and (b) its length