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What do you think when you hear the word « momentum « 

a)1.37 s

b)∞ ( Infinite)

Explanation:

Given that

L= 47 cm              ( 1 m =100 cm)

L= 0.47 m

a)

On the earth :

Acceleration due to gravity = g

We know that time period of the simple pendulum given as

Here

Now by putting the values

T=1.37 s

b)

Free falling elevator :

When elevator is falling freely then

           ( This is case of weightless motion)

Therefore

T=∞  (Infinite)