Question

The length of minutes hand in a pendulum clock is 10 cm the speed of tip of the hand is (in m/s)

• A. $\frac{\pi }{6000}$
• B. $\frac{\pi }{18000}$
• C. $\frac{\pi }{3600}$
• D. $0.01047$

Answer 1

The correct option is D $0.01047$

The seconds arm of the clock covers one complete rotation in $1$minute$=60s$

Radius of the circle that this hand completes is $10cm=0.1m$

Now, total $360°$ completes and the distance travels$=2\pi r=2\times 3.14\times 0.1=0.628m$

Speed$=\frac{distance}{time}=\frac{0.628}{60}=0.01047m/s$