A table clock has its minute hand 9 cm long. What is the average velocity of the tip of the minute hand (a) between 3 am to 3:30 am and (b) between 3 am to 3 pm?
1 Answer
Oct 2, 2017
a)
b)
Explanation:
This is an edit to my previous wrong answer. Apologies for any inconveniences.
a) From 3am to 3:30 am, it makes
But, the displacement of the tip is just 2 × length of the minute hand.
So,
b) From 3am to 3 pm, it completes 12 revolutions.
But the displacement is 0 (it's returns to the same point at the label 12).
So,