Uniform circular motion video questions
Watch this video and answer the following questions as you watch it.
http:/physics.berea.edu/apollo/multimedia/lesson14/lessonp.html
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How long is an arc of a circle in terms of angle an
Physics Lab Write-up for Kinetic and Static Friction
Introduction:
The purpose of this lab was to determine the kinetic and static friction of three different
surfaces; plastic, cork, and felt. Static friction occurs between a motionless object and the su
Conservation of Energy with Rotation
We are going to look at the effect of rotation on conservation of energy. In the following videos, a
circular object falls under the influence of gravity. Without rotation, we expect that gravity will do work
to accele
KEY CONCEPTS
CIRCULAR MOTION AND ROTATION
1. UNIFORM CIRCULAR MOTION
So far we have learned a great deal about linear motion. This section addresses
rotational motion. The simplest kind of rotational motion is an object moving in a perfect
circle at a con
1. For each of the following problems, draw a motion diagram, a force diagram (particle model with
force arrows), and a free-body diagram (an actual drawing with forces involved).
(a) Youve slammed on the brakes and your car is skidding to a stop while go
PHY 221, Homework #2
Complete the homework problems on a separate sheet (or sheets) of paper. Leave at least several blank
lines between each problem. Staple this page to the front, and dont forget to write your name at the top of
the page. Alternatively,
Impulse Momentum Activity
We are going to investigate the relationship between momentum and external forces acting on a cart
with momentum.
F=ma
F=m
v
t
F t=m v
Where
F t
m v is the change in momentum of the cart when an external force acts on the cart.
i
Quantitative HW #5, due Friday, March 4, 2016
For all problems, include a particle model free body diagram. Start each problem from a
Fnet = F=ma
statement of Newtons 2nd Law
, where you write the sum as a list of added
forces in symbol notation (no numbe
PHY 221: Practice Exam 1 Uncertainty, Units, Kinematics
1) A person initially at point P in the illustration stays there a moment and then moves along
the axis to Q and stays there a moment. She then runs quickly to R, stays there a moment,
and then strol
PHY 221 Spring 2015, Homework #3
due Wednesday, February 10
Complete the homework problems on a separate sheet (or sheets) of paper. Leave at least several blank
lines between each problem. Staple this page to the front, and dont forget to write your name
HW #6 PHY221
Spring 2016, due Wednesday, March 16
1. In the physics lab, you are trying to place pennies on a rotating platform so that they
dont slide off. Your lab partner tells you, Pennies on the outside stay on because
ac =
v2
r . For larger r, the c
Vector Addition activity: Introduction to 2D kinematics
https:/phet.colorado.edu/sims/vector-addition/vector-addition_en.html
For all of the activities where you create a representation in the simulation, take a screen capture or use
the snipping tool to
Homework #4, due Wednesday, October 12
Chapter 20
1. Find the amplitude, wavelength, wavenumber, and angular frequency constant of the traveling
waves in the graph below.
y m
4
24 m s
2
5
10
15
20
x m
2
4
2. A circular wave pattern is shown below. What is
Homework #3 Chapter 14: Oscillations
Due Friday, September 30
1. When a piano string is hammered to play an E note, the string vibrates at 659 Hz. What is the
period of vibration?
2. An atom with two bonds vibrates as if connected to two identical springs
Conceptual Homework #1
Due Wednesday, August 27
1. Give three examples of oscillatory motion. (Note that circular motion is not the same as
oscillatory motion.)
2. The figure shows the position vs. time graph of a particle in simple harmonic motion (SHM).
PHY 221 Spring 2015, Homework #2
due Friday, January 29
Complete the homework problems on a separate sheet (or sheets) of paper. Leave at least several blank
lines between each problem. Staple this page to the front, and dont forget to write your name at
PHY 221 Spring 2015, Homework #1
due Monday, January 18
Complete the homework problems on a separate sheet (or sheets) of paper. Leave at least several blank
lines between each problem. Staple this page to the front, and dont forget to write your name at
Physics 222, Test 1, September 22, 2016
Name:_
All problems should be solved using the rubric at the end of the document. You may solve these
as if they were homework. Internet, TAs, and book are permitted. You will solve one of these
problems I choose, u
HW #1 Chapter 12: Rotation of a Rigid Body
Due Friday, September 3
1. A skater with arms extended outward spins at 200 rpm. At what speed do her fingertips travel if
they are 75 cm from her center?
2. A high speed drill reaches 2000 rpm in 0.5 s.
a. What
Homework #2
Chapters 20
1. A rod made of plastic has a charge of -15 nC.
a. Have electrons been added or removed?
b. How many electrons were added/removed?
2. What it the total charge of all the protons in 1 mole of He gas?
3. How close must two electrons