Question

A pendulum clock is beating seconds at a place where acceleration due to gravity is 980 cms-2 . If it is to show correct time at a place where acceleration due to gravity is 982 cms-2 , its length should be

Answer 1

Answer:

Solution

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Correct option is B)

A seconds pendulum is a pendulum whose period is precisely two seconds; one second for a swing in one direction and one second for the return swing. i.e.

T=2s

and T=2π

g

l

⇒l=

4π

2

T

2

g

=

4π

2

2

2

×980

=99.29cm≅99.2cm

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