Question

if length of simple pendulum is increased by 21% then find the change in time period​

Answer 1

Time period = 2π*√length/gravitational acceleration
So, New length = length + 21/100(length) = 121/100(length)

So, New time period = 2π*√new length / gravitational acceleration
= 2π*11/10*√length/gravitational acceleration
= 1.1 * Original time period
So, that means the time period increases by 10%

Answer 2

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