PHY121: University Physics I
Topic 1, Lecture 2 Preview
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Projectiles
PHY 121
Topic 2: Lecture 5 - Preview
Contents:
Section 4.3
Projectile problem-solving practice
Range
Effect of air resistance
From projectile to satellite
White Shark Projectile
Objectives
Apply the principle of independence of motion to solv

Projectiles
PHY 121
Topic 2: Lectures 3, 4, 5
Team Class Problems
Rolling Ball
A ball rolls of flat roof top with a speed of 16m/s.
It lands on the ground below at a distance of 45m
from the building. How high is the building?
Bombs Away
A package is drop

Uniform Circular Motion (UCM)
2-Dimensional Motion, where the speed remains
the constant but the direction changes
uniformly
Requires a net force, to force the object to
change direction which way does it have to
point?
Velocity vector is always tangent t

PHY121: University Physics I
Introduction Preview
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Circular Motion and Other
Applications
PHY-121
Topic 3: Lecture 3 Preview
Contents
Sections 6.1 4
Two-Body systems
Uniform and Non-Uniform Circular Motion
Resistive Forces
Objectives
Review previous weeks problems (skip over to 18 and
then and come back t

Team Problems
PHY-121
Topic 3: Lecture 4
Friction Can Save Your LIfe!
Atwood Machine
Find the tension in the string and the acceleration for the
following system:
pulley
0.720 kg
0.250 kg
Coefficient of Friction
If a horizontal force of 15 N moves a 5.0 k

Free Fall
PHY 111
Topic 1: Lecture 4
Road Trip
You want to travel a distance of X km with an average speed of 50. km/h.
After having traveled X/2 km, you noticed that your average speed so far
was 35 km/h. What should your average speed be for the remaind

Vectors
PHY 121
Topic 2: Lecture 1 Preview
Contents:
(Sections 3.2, 3.3)
Review / learn vector math
Objectives
Understand the rules of vector addition and subtraction.
Apply graphical methods of vector addition and subtraction to
determine the displace

Applications
PHY-121
Topic 3
Week 5 Team Problems
This Legs Got Traction
The leg and cast in the figure below weighs 220 N (Fw1).
Determine weight Fw2 and angle needed so that no force
is exerted on the hip joint by the leg and the cast.
Lopes UP!
A 450N

MAT-264 Calculus II
Your Instructor
Chris Petersdinh
CSET building 3rd floor, room 57-325-7
Office hours:
MWF 9:00-11:00 and 1:50-3:10
3:00-4:00 in 16-401 (content clinic)
T 9:00-10:00 in 57-202 (content clinic, not me)
chris.petersdinh@gcu.edu
(602) 6

PHY111: General Physics I
Topic 1, Lecture 1
Estimates (Fermi Problem)
How many pizzas are sold during a typical Lopes Basketball game?
Hint: Use the Polya problem-solving steps and make reasonable
assumptions as needed (Understand, Plan, Attack, Reflect)

Applications of
Newtons Laws of Motion
PHY-121
Topic 3: Lecture 5 Preview
Objectives
Understand and apply a problem-solving
procedure to solve problems using Newton's
laws of motion.
Further re-enforce Friction, Ramps, and TwoBody problems.
Apply Newtons