Welcome to PHY 121 Blog Help. Here's how it works. For each homework question and lab report we will make a post, this will probably contain a few tips on what the problems are about and how to solve them. If you are stuck on something then instead of emailing us directly you should post a comment in reply to the relevant post. We will try to guide you through tough points and help you understand the problems and the concepts behind them.
Wednesday, October 20, 2010
Ch9 2 #1
See sheet 14 and use Newton's 2nd law, F = ma.
5 comments:
Anonymous
said...
Stop teaching us new stuff! Give us time to review!
The acceleration is 0 when a system is at equilibrium. That should help with C. As for b, use the equations F=-kx and F=ma. Make -kx=ma, then solve for a.
5 comments:
Stop teaching us new stuff! Give us time to review!
I don't understand parts B and C? Where do you come up with a equation with the variables A. m and k??
What is the force law for a spring? Use this and Newton's 2nd law. You won't use numbers for this problem, just the symbols.
The acceleration is 0 when a system is at equilibrium. That should help with C. As for b, use the equations F=-kx and F=ma. Make -kx=ma, then solve for a.
How do we do parts b and c ?!?
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