Question

The length of the second’s hand of a clock is 10 cm. What is the speed of the tip of this hand?

Answer 1

answer : 0.01046 m/s

explanation : length of second's hand of a clock, r = 10cm = 0.1m

so, circumference of circular clock, s = 2πr = 2 × 3.14 × 0.1 = 0.628 m

as we know, second hand complete one revolution in 60 seconds.

so, time taken to complete distance 0.628m by second's hand is 60s

so, speed of its tip = circumference/time

= 0.628/60

= 0.01046 m/s

hence, speed of its tip is 0.01046 m/s