Homework Help: Physics please check

Posted by Mary on Tuesday, April 24, 2007 at 7:01pm.

An electric clock is hanging on the wall in the living room. The clock is unplugged, and the second hand comes to a halt over a brief period of time. During this period, what is the direction of the angular acceleration of the second hand?

a. clockwise
b. counterclockwise

Why?

I choose clockwise but I am not sure why. Please help!

angular acceleration= wf-wi/time

Notice that wf is zero, so if clockwise is positive, then angular acceleration is the negative of that.

Physics please check - Charlie, Sunday, November 14, 2010 at 9:04pm
Answer is Counter Clock Wise

Answer this Question

Related Questions

physics - An alarm clock uses 5.0 watts of electric power. If the clock is ...
Physics - What is the angular momentum of the second hand on a clock if the ...
English - It's two p.m. There is a clock picture on the page. Draw an hour ...
Trig - Linear and angular speed Find w for each of the following: 1. the minute ...
physics - Consider the motion of the hour hand of a clock. What angle does the ...
physics? - The minute hand of a bedside clock is 2.5 cm long. In order for the ...
legal aid - with regard to statute of limitation the term "tolling" ...
Math - 1) The hour hand on a clock has a length of 12 cm. Let the orgin be at ...
math - 1) The hour hand on a clock has a length of 12 cm. Let the orgin be at ...
physics - At 15 minutes past the hour, a 50 g mouse runs up a grandfather clock ...

For Further Reading

First Name:
School Subject:
Answer: