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Answer 1 · 2018-03-13T14:38:56

Time taken to reach point of equilibrium from extreme position is #T/2# where, #T# is the time period.

Given, #T/2=1# so, #T=2s#

So,time period of a seconds pendulum is #2s#

Formula for time period of seconds pendulum is,

#T=2pisqrt(L/g)# where,#L# is its length and #g# is acceleration due to gravity.

Given,#T=2s,L=0.9933m#

putting the values we get,

#g=(4pi^2L)/T^2= 9.802ms^-2#