Question

an ideal pendulum oscillates in vacuum between two extreme position A and B if it goes from position A to positionB and then returns from position B to mean C in 3 s then it will complete 3.5 oscillation in

Answer 1

Travelling time from A to B to C is 3 second.

For one complete oscillations A to B to A.

We know system is in vacuum,

Hence, time taken B to C will be equal to C to A.

For .75 oscillations time is 3 second

Hence for 1 oscillations time will be  sec.

So, for 3.5 oscillations time will be

                           = 14 second