ICSE Class 7 Answered

Find the length of a simple pendulum whose time period is 12.56 sec.

Asked by Topperlearning User | 13 May, 2015, 09:06: AM

Expert Answer

$begin mathsize 12px style straight T space equals space 2 straight n square root of straight l over straight g end root straight T space equals space 12.56 space straight s straight g space equals space 9.8 space straight m divided by straight s squared straight n space equals space 3.14 Substituting space the space values space in space the space formula comma space we space get 12.56 space equals space 2 cross times 3.14 square root of fraction numerator straight l over denominator 9.8 end fraction end root fraction numerator 12.56 over denominator 2 cross times 3.14 end fraction space equals space square root of fraction numerator straight l over denominator 9.8 end fraction end root 2 space equals space square root of fraction numerator straight l over denominator 9.8 end fraction end root Squaring space both space side comma space we space get 4 space equals space fraction numerator straight l over denominator 9.8 end fraction rightwards double arrow straight l space equals space 4 cross times 9.8 therefore space straight l space equals space 39.2 straight m end style$

Answered by | 13 May, 2015, 11:06: AM

Please Login or Sign up to continue!

ICSE Class 7 Answered

Choose Filters

Open In Ask A Doubt App ?

Get in Touch

Call / Whats App