Question

A student notices the swing of a pendulum. She notices that the bob of the pendulum starts from position A to C and then back to A in 2 seconds. What is the time period of the pendulum?

(a)0.5 second
(b)1 second
(c)2 seconds
(d)4 seconds

Answer 1

Answer:

option B) 2 seconds shichan

Answer 2

Answer:

Here time period depends upon length.

In first part till obstacle is not there time =

2

T

=1 second

After obstacle length becomes

4

1

So time period become

2

T

Time elapsed will be t

′

=

4

T

=0.5second

So total time =t+t

′

=1.5 sec=

2

3

sec