If the length of second's hand of a clock is $10 c m$ , the speed of its tip (in $c m s^{- 1}$ ) is nearly

2

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0.5

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1.5

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1

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Solution

The correct option is D $1$
$r = w R = 10 \times \frac{2 π}{60}$
$= \frac{π}{3} c m / s \approx 1 c m / s$
Ans. (D)

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If the length of second's hand of a clock is 10cm, the speed of its tip (in cms−1) is nearly

The correct option is D 1r=wR=10×2π60=π3cm/s≈1cm/sAns. (D)

If the length of second's hand of a clock is $10 c m$ , the speed of its tip (in $c m s^{- 1}$ ) is nearly

The correct option is D $1$
$r = w R = 10 \times \frac{2 π}{60}$
$= \frac{π}{3} c m / s \approx 1 c m / s$
Ans. (D)