Question

The time periods of two pendulums are 2.0s and 1.0s respectively.if the length of the first pendulum is 1.0m.what is the length of second

Answer 1

The second pendulum is of 2.0 m

Answer 2

L is directly proportional to square of T(time period)

=>T1= 2 sec,T2=1 sec,L1=1m,L2=?
x be the length of second pendulum

so,1/x=square of (2/1)

1/x=4/1

Criss crossing this,we get

x=1/4=0.25

0.25 will be length of second pendulum..