Question

A simple pendulum completes 40 oscillations in one minute. Find its (a) frequency, (b) time period. Ans. (a) 0-67 s (b) 1-5 s 1.

Answer 1

It option b:1.5s

Explanation:

Number of Oscillations, N=40  

Time t=1min

Frequency f=  t /N  =  60/ 40

=0.667Hz  

Time period,T=  1/f   =1.5sec

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

Answer 2

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(1) Frequency = oscillation/Time

Frequency = 40/60

Frequency = 2/3Hz

Frequency = 0.67 Hz

(2) Time period = Time/Oscillation

Time Period = 60/40

Time Period = 3/2sec

Time Period = 1.5sec