# The Tip of Seconds’ Hand of a Dock Takes 60 Seconds to Move Once on the Circular Dial of the Clock. If the Radius of the Dial of the Clock Be 10.5 Cm, - Science

The tip of seconds’ hand of a dock takes 60 seconds to move once on the circular dial of the clock. If the radius of the dial of the clock be 10.5 cm, calculate the speed of the tip of the seconds’ hand of the clock. ("Given"  π= 22/7).

#### Solution

We have the following information,
Time, (T) = 60 s
Radius of circular path, (r = 0.105)
The speed of a body moving along a circular path is given by the formula :
v = (2pir)/T
v = "(2(22)(0.105))/((60)(7)) m/s
= (4.62/420) m/s
= 0.01 m/s

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#### APPEARS IN

Lakhmir Singh Science Class 9 Physics
Chapter 1 Motion
Long Answers | Q 37.2 | Page 41