Question

Observe the second hand of the clock. What about his moves and speed ?​

Answer 1

The second, or sweep, hand moves relatively quickly, taking a full minute (sixty seconds) to make a complete rotation from 12 to 12. For every rotation of the second hand, the minute hand will move from one minute mark to the next. The minute hand rotates more slowly around the dial.

Answer 2

Answer:

For a second hand of length 1m, speed will be 0.052$ms^{-1}$

Explanation:

Second hand like the other hands of the clock moves in a circle.

Speed of a second is different at different lengths of the hand. Therefore, it is more convenient to define its angular speed.

One complete circle contains $360^o$ angle or $2 pi$ radians angle.

Second hand complete a full circle in 60sec.

Angular velocity = $\frac{angle traversed}{time taken}$ = $\frac{2.\pi}{60} = 0.052rad/sec$

or

Angular velocity = $\frac{360}{60}=6^o/sec$

Let's say that the length on the second hand is 1 meter.

Then, speed of the tip of the hand will be = $0.052 rad/s * 1m = 0.052ms^{-1}$

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