If the length of a pendulum is made 9 times and mass of the bob i… - Vidyadip

MCQ

If the length of a pendulum is made $9$ times and mass of the bob is made $4$ times then the value of time period becomes

✓
$3T$
B
$\frac{3}{2}T$
C
$4T$
D
$2T$

✓

Answer

Correct option: A.

$3T$

a
(a) $T = 2\pi \sqrt {\frac{l}{g}} $

==> $T \propto \sqrt l ,$

hence if l made $9$ times $T$ becomes $3$ times.

Also time period of simple pendulum does not depends on the mass of the bob.

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