Acceleration with change in direction

AI Thread Summary
The discussion centers on calculating the average acceleration of a clock's second hand as it moves from the 12 to the 3 position, with a radius of 5 cm. The user initially calculated the acceleration as 0.0047 m/s², while the textbook states it should be 0.00049 m/s². It was clarified that the user did not correctly convert the radius from centimeters to meters, as 5 cm equals 0.05 m. After confirming the conversion, it was concluded that the textbook's answer is indeed correct. The importance of proper unit conversion in physics calculations is emphasized.
Mavlax
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Homework Statement


Calculate the average acceleration of the tip of the second hand from the moment it hits the 12 to the moment it hits the 3 position. The radius is 5 cm. Its a clock by the way.
I've been at it for over an hour and am beggining to susspect my textbook is wrong.


Homework Equations


a= v2 - v1 / t


The Attempt at a Solution


I got 0.0047 m/s squard.
The textbook says its 4.9 x 10 to the power of negative four [S 45 W]. So 0.00049 m/s squard.
 
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Can you give the detailed explanation?...by the way did you do the conversion right i.e. 5cm=0.05m
 
i solved it and found the text is right ... you haven't done the conversion.
5cm = 0.05m
 
Yes the answer is correct as per the textbook!
 

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