Answer to Question #84264 in Physics for Sayem

Question

The length of the clocks second hand is 45 mm. What's the average velocity of the end point of this second hand during any thirty seconds of time?

Answer 1

The average velocity of the end point of the second hand

v=s/t

The displacement of the end point of the second hand during any thirty seconds

s=2R

So

v=2R/t

=(2×45 mm)/(30 s)=3 mm/s