1. When work is done twice as quickly,
then the power expended is
a. half.
b. the same.
c. twice.
d. 4 times as much.
2. How much work is done on a
200-kg crate that is hoisted 2 m in
a time of 4 s?
a.
b.
c.
d.
400 J
1000 J
1600 J
4000 J
3. John lifts a b
Dynamics III
Friction and Inclines
FBD
Example
A box with a mass of 60.0kg is being pulled by two
forces as show below. Find the net acceleration of
the box. Which way is the box moving?
12.0 N
= 30.0
12.0 N
What will the scale read if the elevator is at
(i
Chapters 1 & 2 Multiple Choice Name ' Row #
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Justify each answer, show calculations if used.
1) When an object is released from rest and falls in t
Exploring electric charges
PURPOSE: USE SIMULATIONS TO EXPLORE ELECTROSTATIC INTERACTIONS
In this online lab you will use simulations to check your knowledge regarding electrostatic interactions.
Balloons and Static Electricity Simulation
To interactively
Dynamics I
Forces & Newtons First Law
4 Natural Forces
Gravity: acts between all masses in the
universe and has infinite range
Electromagnetic
(EM) Force: acts
between electrically
charged particles
and magnetically
charged poles
Strong Nuclear Force (
Unit 2 Multiple Choice Questions
The position vs. time graph of a moving object is shown
to the right. Use this graph to answer questions 26
through 30.
1. What is the average speed from 0 s to 4 s?
A. 0.5 m/s
B. 1 m/s
C. 2 m/s
D. 3 m/s
E. 4 m/s
2. What i
Waves
Waves
A
wave is a rhythmic disturbance that
carries energy through matter or space.
Examples
of Waves:
Light
Radio waves
Sound
Electric signals
Ocean waves
Earthquakes
Vibrations in structures (musical instruments)
Waves
All*
waves have a s
Circular Motion
vt
ac
Uniform Circular Motion
When an object moves in a circle, its velocity is
continuously changing direction
The direction of the objects velocity is tangent
to the circle
The magnitude of the velocity is called
tangential speed, vt
lide1
Keplers Laws of Planetary
Motion
Keplers laws describe the motion of the planets.
First Law: Each planet travels in an elliptical
orbit around the sun, and the sun is at one of the
focal points.
Second Law: An imaginary line drawn from the
sun to
John Travoltage
Physics
Purpose
To determine the likelihood of getting a carpet shock (based on controllable variables), and to
avoid or produce such shocks under a series of challenging conditions
Apparatus
computer PhET simulation, John Travoltage (av
Electrostatics
Insulators and Conductors
Insulators
In insulators, electrons are bound in orbit to the
nucleus in each atom.
When charge is placed on an insulator, it stays in one region
and does not distribute.
Wood, plastic, glass, air, and cloth are go
Quiz B
Chapter 3: Linear Motion
1.
a.
b.
c.
d.
A glance at your speedometer will
tell you your
average speed.
instantaneous speed.
instantaneous velocity.
acceleration.
2.
You hike a distance of 1 km in 30
minutes. Your average speed is
a. 0.5 km/h.
b. 1
Chapter 9
Gravity
1. Legend tells us that Newton realized
that the idea of an apple in free fall
applies to
a. all apples.
b. the Moon.
c. Both of these.
d. Neither of these.
2. The Moon falls toward Earth in the
sense that it falls
a. with an acceleratio
Quiz E
Chapter 8
Rotational Motion
1. The rotational inertia of an object is
greater when most of the mass is
located
a. near the center.
b. away from the rotational axis.
c. on the rotational axis.
d. off-center.
2. Which of these will roll down an
incli
INSTRUCTOR: DR. SUSAN STOLOVY
PHYSICS 11 SYLLABUS FOR SPRING 2014, EL CAMINO COLLEGE
Email: [email protected]
Office: Physics 104D
Phone: 310-660-3593 x 3233
Section 1610: M 1:00-4:35pm, Phys 101 (does not meet Jan. 20, Feb. 17, and
March 17)
Welcome
Homework C solutions
Dr. Stolovy Phys 11
Ch. 4: exercises:
1, 4, 5, 9, 14, 18, 21, 31, 38, 44
Problem #6
Ch. 4
1.Yes, as illustrated by a ball thrown vertically into the air. Its velocity is initially up,
and finally down, all the while accelerating at a
1. When a farmer throws a 3-kg pumpkin
at a speed of 4 m/s onto a compost pile,
the pumpkins momentum just before
hitting the pile is
a.
b.
c.
d.
0 kgm/s.
5 kgm/s.
7 kgm/s.
12 kgm/s.
2. Compared with the momentum of a
200-lb man running 10 mi/h, the
momen
Solutions
Homework A: Ch. 2 exercises: 1,4,6,10,11,14,18,22,24,28
1.The tendency of a rolling ball is to continue rollingin the absence of a force. The fact that it
slows down is due to the force of friction.
4. Galileo demolished the notion that a moving
1) A scientific hypothesis can be
disproved with
a.
b.
c.
d.
.
one reproducible experiment.
disapproval of other scientists.
many tests by many scientists.
philosophical reasoning.
2) A person who says, thats only a
theory likely doesnt know that a
scient
Homework B solutions
Dr. Stolovy Phys 11
Ch. 3: 6, 8, 13, 14, 17, 23, 26, 27, 40
Ch. 3 problems # 4: find both the acceleration AND the distance
traveled in 10 s.
6.
Yes, velocity and acceleration need not be in the same direction. A car moving
north that
UNIT 2: KINEMATICS I
MOTION IN 1D, VECTORS AND VELOCITY
DESCRIBING MOTION
Kinematics describes quantitatively how an object
moves through space.
(rigid and non-rotating, motion is based on the center
of the object)
Dynamics focuses on change in motion(