Physics 228 Winter 2009
HW V Solutions
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 _
dz 83/ 63; _
Physics 228 Winter 2009
HW VI Solutions
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
St. ID No.
Phys. 228 W17
20 pts total
(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
Wednesday, October 26, 2016
Tennis ball and raquet
Ball squash, and raquet bends
But they return back
Reading Quiz 12-4
Every single part is moving in same part of direction
Reciprocity of orces
Monday, October 31, 2016
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
Wednesday, October 12, 2016
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
-Inertia is determined ent
Monday, October 24, 2016
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
Relative Velocity: difference in velocity between objects
Relative speed: magnitude of relative velocity
Monday, October 17, 2016
The final speed is lower than the initial speed after collision
The final mome
Monday, January 30, 2017
Rod has negative charge, cloth has positive charge
Doubled charge at every point for both
Distribution is the
Double at every point then that means the electric field shape is the same so the
Name _Student ID _ Score_
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_
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
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
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
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:
Physics 224 Thermal Physics
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