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ICSE Class 7 Answered

Show that the length of a seconds pendulum is nearly 1 m. (Take g = 9.8 m/s2)
Asked by Topperlearning User | 13 May, 2015, 09:06: AM
answered-by-expert Expert Answer

begin mathsize 12px style straight T space equals space 2 straight n square root of straight l over straight g end root rightwards double arrow straight l space equals space fraction numerator straight T squared straight g over denominator 4 straight n squared end fraction For space straight a space second apostrophe straight s space pendulum comma space straight T space equals space 2 straight s straight g space equals space 9.8 straight m divided by straight s squared space equals space 980 space cm divided by straight s squared straight l space equals space fraction numerator 2 squared cross times space 980 over denominator 4 cross times space open parentheses begin display style 22 over 7 end style close parentheses squared end fraction space equals space 99.39 space cm So comma space the space length space of space straight a space second apostrophe straight s space pendulum space is space 99.39 space cm space or space nearly space 1 straight m. end style

Answered by | 13 May, 2015, 11:06: AM
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ICSE 7 - Physics
Explain the following terms connected with a simple pendulum:(i) Length of a pendulum. (ii) One oscillation. (iii) Mean position.
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what is the formula of universal gravity ?
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