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Two pendulums of length 1.21 m and 1.0 m...

Two pendulums of length 1.21 m and 1.0 m starts vibrationg. At some instant, the two are in the mean position in same phase. After how many vibrations of the longer pendulum, the two will be in phase ?

A

10

B

11

C

20

D

21

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Two pendulums of lengths 100 cm and 121 cm suspended side by side. A suspended bobs suspended at its end stretched and leave together. After how many minimum oscillations of big pendulum, both are in same phase?

    A
    `11`
    B
    `10`
    C
    `21`
    D
    `20`

  • Two wires A and B are of the same material their lengths are in the ratio 1 : 2 and the diameter are in the ratio 2 : 1. If they are pulled by the same force, their increase in length will be in the ratio ........

    A
    `2:1`
    B
    `1:4`
    C
    `1:8`
    D
    `8:1`

  • Two wires of the same material and same length but diameters in the ratio (1 : 2) are stretched by the same force. The potential energy per unit volume of the two wires will be in the ratio .........

    A
    `1:2`
    B
    `4:1`
    C
    `1:1`
    D
    `16:1`
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