Question

a simple pendulum completes 60 vibrations in 30 seconds. find the time period______

a) 2 second

b) 4 second

c) 0.5 second

d) 8 second

Answer 1

⭐⭐⭐⭐⭐ ANSWER ⭐⭐⭐⭐⭐

In 30 seconds, 60 vibrations take place.

So, in 1 second, (60/30) vibrations take place.

Hence, frequency = (60/30) Hz. = 2 Hz.

Time period = 1/frequency = (1/2) sec.
= 0.5 sec [OPTION (C)]

⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐

Answer 2

HELLO MATE.

$60 \: vibrations \: in \: \: \: 30seconds \\ \\ 60 \div 30 = 2 \ one\: time\: 1 \div 2 = \: ( 0.5)$
thanks ;]☺☺☺☺