Question

1. A simple pendulum completes 40 oscillations in one minute. Find its (a) frequency, (b) time period.

2. The time period of a simple pendulum is 2 s. What is its frequency ? What name is given to such a pendulum ?

3. A seconds' pendulum is taken to a place where acceleration due to gravity falls to one-fourth. How
is the time period of the pendulum affected, if at all ? Give reason. What will be its new time period ?​

Answer 1

Explanation:

1

Given

Number of Oscillations, N=40

Time t=1min

Frequency f=

t

N

=

60

40

=0.667Hz

Time period,T=

f

1

=1.5sec

Hence, frequency is 0.667Hz and time period is 1.5sec

2 answer

Frequency , ff=1/T=1/2=0.5Hz

=0.5Hz

This is called second's pendulum.