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Two simple pendulums of length 5 m and 20 m respectively are given small linear displacements in one direction at the same time. They will again be in the same phase when the pendulum of certain length has completedminusoscillations.(1) 2, (2) 1, (3) 5, (4) 3
Asked by patra04011965 | 11 Jul, 2019, 20:10: PM
answered-by-expert Expert Answer
Period of oscillation is directly proportional to square root of length.
 
If a pendulam of length 5 m has period T, then pendulam of length 20 m has period 2T
 
Hence periods are in the ratio 1 : 2.
 
when 5 m length pendulam makes two complete oscillations, 20 m length pendulam make one complete oscillation
and both will be in phase after 2T time duration staring from initial time.
 
Answer : (1) 2
Answered by Thiyagarajan K | 11 Jul, 2019, 20:35: PM

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