(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A watch has a second hand 2.0cm long.

a) Compute the speed of the tip of the second hand.

b) What is the velocity of the tip of the second hand at 0.0 seocnds? At 15 seconds?

c) Compute its change in veloicty between 0.0 and 15 seconds.

d) Compute its average vector acceleration between 0.0 and 15 seconds.

2. Relevant equations

a = v^2/r = 4 (pi^2) (r) (f^2)

3. The attempt at a solution

a) v = 2.1 E -3 m/s

b) @t = 0s ;v= 2.1 E -3 m/s [east]

@t = 15s ;v= 2.1 E -3 m/s [south]

c) Change in velocity = 2.1 E -3 [45 degrees S of E]

d) a = 2.2 E -4 m/s^2 [45 degrees S of E]

Are these the right answers?! Please help :)

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# Homework Help: Circular Motion on a Clock Question

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