homework help > physics > physics q&a board > topic: application of newton's laws...

Q BgQuestion:

      
Novice
Karma Points: 25
Respect (93%):
posted by  jazbo.fe on 7/22/2009 5:56:48 PM  |  status: Closed  |  Earned Karma: 25

Application of Newton's Laws

Course Textbook Chapter Problem Needs by
N/A N/A N/A N/A N/A
Question Details:
A backpack full of books weighing 53.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 150 N/m is attached to the backpack and pulled horizontally. If the spring stretches by 2.30 cm, what is the coefficient of static friction between the backpack and the table?
Tags: Physics
Bonus Point Alert! Earn +8 additional karma points for helping this gold member.

AAnswers:

Answer Question Ask for clarification
Sage
Karma Points: 4,242
posted by MasterChef on 7/22/2009 6:02:59 PM  |  status: Live
Asker's Rating: Lifesaver   
Response Details:
There are two forces acting on the backpack. The spring force in one direction and the force of static friction in the other direction. Since the object is not in motion, these two forces must be equal, so we have:
Please don't forget to Rate!
Answer Question Ask for clarificarion
Ask New Question

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today » How Cramster is different from tutoring »

Need Help In

Useful Links