Calculate the angular speed of the second's hand of clock, assuming that it moves with a uniform angular speed. If the length of the second's hand is $2 c m$ .

0.21 cm/s

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0.02 cm/s

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2.7 cm/s

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9 cm/s

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Solution

The correct option is A 0.21 cm/s
$w = \frac{θ}{t} = \frac{2 π}{60}$
$v = r w = 2 \times \frac{π}{30}$
$= 0.21 c m / s$

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Calculate the angular speed of the second's hand of clock, assuming that it moves with a uniform angular speed. If the length of the second's hand is 2cm.

The correct option is A 0.21 cm/sw=θt=2π60v=rw=2×π30=0.21cm/s

Calculate the angular speed of the second's hand of clock, assuming that it moves with a uniform angular speed. If the length of the second's hand is $2 c m$ .

The correct option is A 0.21 cm/s
$w = \frac{θ}{t} = \frac{2 π}{60}$
$v = r w = 2 \times \frac{π}{30}$
$= 0.21 c m / s$