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Physics 207, Fall 2008
1
Cornell University
Assignment 4
Concepts:
mass and force
free body diagrams
Newton’s First, Second and Third Laws
coupled objects and third law partners
gravity, tension, springs
applying Newton’s laws
contact forces and normal force
static and kinetic friction
Reading in text:
Chapter 5: Section 9; Chapter 6: Sections 13
Assignment:
Due in lecture on Wednesday, September 24.
Please turn in this sheet stapled to the top of your work.
A.
OnLine Math WarmUp Problems:
If you'd like practice with the math skills relevent to the work
we're doing this week and next, please go to
www.blackboard.cornell.edu
, log in to the Physics 207 Math
Review web site, and then do the tests on Limits and Small Changes, and review the tests on Triangles
and Sines and Cosines 1.
You can attempt the tests as many times as you like.
Physics Problems:
1. Chapter 5, Problem 13
(a) For each of the setups (a), (b), and (c), draw a
free body diagram
for each
salami and for the spring scale.
(b) Answer the questions in parts (a), (b), and (c) of the problem.
2. Chapter 5, Problem 20
3. Chapter 5, Problem 32
4. Chapter 5, Problem 53.
In (a), what is the common acceleration of the two blocks?
5. Chapter 5, Problem 59
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 Fall '07
 LIEPE, M
 Physics, Force, Gravity, Mass, Cornell University, flat surface, OnLine Math WarmUp

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