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Calculate the speed of tip of minutes ha...

Calculate the speed of tip of minutes hand of a clock, whose length is `7 cm`.

Text Solution

Verified by Experts

Here, `l = r = 7 cm xx 10^(-2)m`.
Taken by minutes' hand to complete one revolution, `T = 60 min = 60 xx 60 s = 3600 s`
speed, `v = (s)/(t) = (2 pi r)/(T) = 2 xx (22)/(7) xx (7 xx 10^(-2))/(60 xx 60) = (11)/(9) xx 10^(-4) = 1.22 xx 10^(-4)m//s`.
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Knowledge Check

  • Calculate the speed of the tip of second's hand of a watch of length 1.5 cm .

    A
    `0.16 cm//s`
    B
    `0.12 cm//s`
    C
    1 cm/s
    D
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  • The speed of the tip of second's hand of a watch of length 1.5 cm is

    A
    0.32 cm `s^(-1)`
    B
    1 cm `s^(-1)`
    C
    0.16 cm `s^(-1)`
    D
    0.5 cm `s^(-1)`

  • The angular speed of the minutes hand of a clock in degree per second is

    A
    `0.01`
    B
    `0.1`
    C
    `0.0`
    D
    `pi//1800`

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