Physics 228 Winter 2009
HW V Solutions
Monday 2/9/09
Assigned problems: To be turned in. The problems assigned in Boas below and the
Special Exercise will be graded. All graded problems are worth 3 points each plus 2
points for the Mathematica check and/o
Name St. ID No. Phys. 228 W17
(print) Last First
20 pts total Quiz 4 SHOW YOUR WORK Feb. 9, 2017
If I [y] = f F (x, y, 3/ )da: is stationary with respect to small variations in y(;1:), with y(:c) xed
at the endpoints, then
d 6F 8F _
0
dz 83/ 63; _
The ai
Physics 228 Winter 2009
HW VI Solutions
Thursday 2/12/09
Assigned problems: To be turned in. The problems assigned in Boas below will be
graded. All graded problems are worth 3 points each plus 2 points for the
Mathematica check and/or plot where requeste
Name
(print)
St. ID No.
Last
Phys. 228 W17
First
20 pts total
Quiz 5
(SHOW YOUR WORK)
Series solutions. Consider the following differential equation for y(x)
Feb. 16, 2017
(x2 + 1)y 00 2xy 0 + 2y = 0 .
We want to find the general solution
(which will depe
Potential Energy
Wednesday, October 26, 2016
10:42 AM
Tennis ball and raquet
Ball squash, and raquet bends
But they return back
Reading Quiz 12-4
Coherent:
Every single part is moving in same part of direction
Lecture 10/26/2016
Non-dissipative interactio
Reciprocity of orces
Monday, October 31, 2016
10:33 AM
Whenever two objectw interact, they exert on each other forces that are equal in magnitude but
opposite in direction. These forces are called an interaction pair.
Reading quiz 14-3
A worker pushes a b
Inertia
Wednesday, October 12, 2016
10:30 AM
The tendency f an object to resist a change in its velocity is called inertia
The unknown cart had bigger inertia because it resisted more change to velocity than to the standard
cart
-Inertia is determined ent
Reading 6.8-7.3
Monday, October 24, 2016
10:31 AM
Example 11-2
Mazur 6.39
A boy and a girl are resting on seperat refts 12 m apart
Small toy float between rafts
Girl and raft inertia = 2m
Boy and raft = 1m
Rafts connected by 14 m long rope
Girl pulls on r
Chapter 5
Relative Velocity: difference in velocity between objects
Relative speed: magnitude of relative velocity
Monday, October 17, 2016
12:23 AM
Inelastic Collisions:
The final speed is lower than the initial speed after collision
V
V
V
The final mome
Monday, January 30, 2017
6:51 PM
Checkpoint 26.1
Rod has negative charge, cloth has positive charge
o
Doubled charge at every point for both
o
Distribution is the
same
o
o
Double at every point then that means the electric field shape is the same so the
n
Name _Student ID _ Score_
last
first
I. Lab questions A cart with mass Mcart = 1530 20 g is held on an inclined track with a
massless string. The incline of the track is 10. All frictional forces can be neglected in this
problem. The tension force in the
Name _Student ID _ Score_
last
first
I. Lab. Two carts on a level, frictionless track collide head on. Before the collision, cart 1 has
kinetic energy Ekin-1 0.05 J and cart 2 has kinetic energy Ekin-2 0.20 J . After the collision
cart 1 is at rest and ca
I.!
11 Multiple choice questions. (The actual exam will have 10 multiple choice questions)
Use the following setup for questions 1 through 3: A block of mass m is released from rest at a
height of h above a frictionless incline. At the bottom of the incli
Section 7.1 - The Effects of Interactions:
Interaction - An event that produces either a physical change or a change in
motion.
Repulsive interaction - Causes the interacting objects to accelerate away
from each other.
Attractive interaction - Causes
Section 6.1 - Relativity of Motion:
Reference frame - A combination of a reference axis that defines a direction in
space and a reference point that defines the origin from, which motion is
measured.
Earth reference frame - A reference frame at rest re
Section 5.1 - Classifications of Collisions:
Relative velocity: v12 v2 v1
Relative speed: v12 |v2 v1|
Elastic collision - A collision in which the relative speed before the collision is the
same as the relative speed after the collision (non-stick).
Section 4.1 - Friction:
In the absence of friction, objects moving along a horizontal track keep moving
without slowing down.
Section 4.2 - Inertia:
Inertia is a measure of an objects tendency to resist a change in its velocity.
Section 4.3 - What De
Section 3.2 - Acceleration Due to Gravity:
Free fall - the motion of objects moving under the influence of gravity only.
In absence of air resistance, the magnitude of the acceleration of all falling
objects is 9.8m/s2 , and consequently the amount of
Section 2.2 - Position and Displacement:
The x component of an objects displacement is the change in its x-coordinate.
d = |x1 x2|
x = xf xi
Section 2.3 - Representing Motion:
Nothing new, basic information.
Section 2.4 - Average Speed and Average Ve
Section 1.1 - The Scientific Method:
A hypothesis must be experimentally verifiable.
Formulation of a hypothesis almost always involves developing a model, which is
a simplified conceptual representation of some phenomenon.
Section 1.2 - Symmetry:
No
Page 1
Name _solutions_
Physics 224 Thermal Physics
Autumn 2014
Please dont turn this page until the bell goes at 8.30.
Hand your exam to me before I leave the room at 10.25.
Attempt all questions.
Write your name on every page and your SID on the first p