Experiment 6
Newton's Second Law (revised Fall 2011)
A mass is allowed to fall vertically while pulling another mass over a horizontal surface.
The motion of the system is investigated, and the application of Newton's Second Law to the system
allows the d
Chapter 5: NEWTONS LAWS II Hints (Updated 3/26/12)
When solving problems with Newtons 2nd Law the correct free-body-diagrams are
essential. Keep in mind the following:
1. Draw a free-body diagram for each object of interest in the problem.
2. Only real in
Chapter 5: NEWTONS LAWS II:
Application of Newtons Laws (Updated 10/4/11)
When solving problems with Newtons 2nd Law the correct free-body-diagrams are essential.
Keep in mind the following:
1. Draw a free-body diagram for each object of interest in the p
Chapter 3- Two-Dimensional KINEMATICS Hints Updated 9/12/11
1. For the following cases of two-dimensional motion draw motion diagrams showing the velocity
vectors every second, the change in velocity vectors and the acceleration vectors for each second
in
Chapter 7: WORK & ENERGY II Hints: Updated 4/25/12
1. The work-energy principle can be expressed mathematically in different ways. Convince yourself
that the following pairs of equations are equivalent expressions.
a)
b)
c)
d)
[Wnet=K ] and [Wnon-cons=K +
Chapter 8: MOMENTUM Hints-Updated 5/4/12
Momentum (p=mv) is an important concept because its another quantity that is conserved in the
universe. We can relate the change in momentum of a body to what is called the impulse (I=Fnet dt) as
follows. As a resu
Chapter 4: NEWTONS LAWS I (updated 3/15/12)
Basic forces, free-body diagrams, determining acceleration
In the problems below assume that g=10 m/s2. This makes the numerical calculations simpler and
you may be able to forgo using a calculator in many cases
Chapter 14:Static Fluids
We will cover only the case of static fluids. The basic principle is Newtons 1st law, that when applied
to fluids in a constant gravitational field, gives us Pascals law: (Pbelow - Pabove) = gh. This version of
Pascals law asserts
Chapter 12: LAW of GRAVITY-Answers & Hints
(Updated 3/26/12)
If you need astronomical data you should check the Appendix in the back of the text. In these problems
you should use the proper value of g=9.8 m/s2.
1. Galileo deduced that the acceleration due
Chapter 2 : 1-D Kinematics: Velocity & Acceleration Hints & Answers. Updated 9/6/11
1. a) Position is the distance from a predetermined origin; displacement is the distance from the initial to
the final position. The origin is arbitrary and chosen for con
Chapter 3- Two-Dimensional KINEMATICS Problems Updated 9/12/11
Most of the problems in this assignment are projectile problems, but there are also a few circular motion
problems. At the end there a more frame-of-reference vector problems to review. Try to
Chapter 8: MOMENTUM Homework-Updated 5/2/12
Momentum (p=mv) is an important concept because its another quantity that is conserved in
the universe. We can relate the change in momentum of a body to what is called the impulse
(I=Fdt) as follows. As a resul
Experiment 11
Moment of Inertia
A rigid body composed of concentric disks is constrained to rotate about its axis of
symmetry. The moment of inertia is found by two methods and the results are compared. In the
first method, the moment of inertia is determ
Experiment 9
MIRRORS AND LENSES
In this experiment you will learn to determine the focal lengths of mirrors and lenses.
You will also verify the mirror and lens equation and the magnification Formula by direct
measurement of the positions of object and im
Chapter 4: NEWTONS LAWS I Hints: (Updated 3/15/12)
Basic forces, free-body diagrams, determining acceleration
In the problems below assume that g=10 m/s2
1. Clearly distinguish between the following important terms, give examples that illustrate the
diffe
Chapter 2 : 1-D Kinematics:Velocity & acceleration. Updated 9/6/11
Try to do as many problems as you can, emphasizing the ones we do in class. There always will be
more problems than many of you can do, and there will be some very challenging problems tow
Chapter 7: WORK & ENERGY II: Updated 4/7/06
1. The work-energy principle can be expressed mathematically in different ways. Convince yourself
that the following are equivalent expressions.
a)
b)
c)
d)
e)
Wnet= K
[Wnet= K ] and [Wnon-cons= K + U]
[U + K =
Chapter 13: Simple Harmonic Motion Hints (updated 12/3/11)
Simple harmonic motion (SHM) underlies a vast number of natural phenomena from waves to electric circuits.
The fundamental principle of SHM is that the acceleration of a system is proportional and
Experiment
1
Graph Matching
One of the most effective methods of describing motion is to plot graphs of distance, velocity, and
acceleration vs. time. From such a graphical representation, it is possible to determine in what
direction an object is going,
Experiment 10
The Ballistic Pendulum
A spring-loaded gun is used to shoot a projectile horizontally into the bob of a pendulum.
The initial velocity of the projectile can be determined from the vertical rise of the ballistic
pendulum using momentum and en
Experiment6
UniformCircularMotion
A body is suspended by a string from a horizontal crossbar which is spun around a vertical
axis. The body is prevented from swinging outward by a horizontal spring attached to the axis of
rotation. The centripetal force e
Chapter 12: NEWTONS LAWS of GRAVITY
(Updated 10/3/11)
If you need astronomical data you should check the Appendix in the back of the text. In these problems
you should use the proper value of g=9.8 m/s2.
1. Galileo deduced that the acceleration due to gra
Experiment
18
Work and Energy
Work is a measure of energy transfer. In the absence of friction, when positive work is done on
an object, there will be an increase in its kinetic or potential energy. In order to do work on an
object, it is necessary to app
ROTATIONAL MOTION I -Updated 11/7/11
In this unit we revisit every concept we have developed up to this point at the same time that we
learn to analyze rigid, rotating objects.
The basic idea to keep in mind is that every point in a rigid, rotating object
The Addition of Vectors
In this experiment a force table is used to demonstrate experimentally that forces add up as
vectors; that is, both the magnitude and the direction of a force must be considered when forces act
on an object.
Theory
According to New
PHYSICS 21 HomeworkHintsandAnswers:
BACK TO HOMEPAGE
Chapter 14:
1. Check the text or your notes.
2. a) The containers hold the same volume of water. If the mass of the container is negligible, they
should all weight the same and exert the same force on t
ROTATIONAL MOTION I Hints-Updated 5/16/12
In this unit we revisit every concept we have developed up to this point at the same time that we learn to
analyze rigid, rotating objects.
The basic idea to keep in mind is that every point in a rigid, rotating o
ROTATIONAL MOTION II-Updated 5/16/12
In this chapter we further develop rotational analogies to basics concepts in mechanics, such as force
and momentum. The rotational analogy to force is torque (=rxF), which measures the twist on an
object and gives us
Chapter 13: Simple Harmonic Motion Hints (updated 12/3/11)
Simple harmonic motion (SHM) underlies a vast number of natural phenomena from waves to electric circuits.
The fundamental principle of SHM is that the acceleration of a system is proportional and