Review Problems
1.
A student walks 100m west and 50 m south. What displacement will bring him back to the
starting point?(111.8m, 26.50 north of east).
2.
Starting from rest, a car accelerates 4 sec at 4m/s2. After that it maintains its velocity
constant
Energy
Objective:
This lab experiment explores the principle of energy conservation. To analyze the
final speed of an air track glider pulled along an air track by a mass hanger and string
via a pulley falling unhindered to the ground. The analysis will b
Tao Hong
Physics Laboratory
Dr. David Lieberman
06/26/2015
Conservation of Momentum
Objective:
To explore the concept of momentum, and to verify the law of conservation of
momentum.
Introduction:
The momentum of a moving object is defined as the objects m
Dynamics
Objective:
The purpose of this experiment is to show that the force applied to a body of mass
m and the resulting acceleration are proportional to each other.
F=ma
Introduction:
According to the Newtons second law, the acceleration of an object a
Uniform Circular Motion
Data:
Mass of cylinder=0.153 kg
r=0.055 m
Mass of cylinderweights=2.113 kg
Trial
1st
RPM
forward
reverse
forward
reverse
2nd
Period
Fc
Fg
0ifferenc
e
475
0.126
20.800
20.710
0.432
470
0.128
20.364
20.710
1.684
470
0.128
20.364
20.7
Inclined Plane
Objective:
By using an inclined plane and studying the relationship between of the incline
and acceleration down the incline, the acceleration due to gravity can be determined.
Introduction:
When an object is released from rest on an inclin
Coefficient of Friction
Part 1
Objective:
To determine the values of the coefficient of kinetic friction and the coefficient of
static friction for two particular surface.
Introduction:
W
T
f
N
If the object is moving with a constant velocity, the net for
COEFFICIENT OF FRICTION
Introduction:
The vector sum of all the forces acting on a body at rest or moving at constant velocity is zero,
since the system is at equilibrium. The force of friction always opposes the motion and is,
therefore always opposite
CONSERVATION OF MOMENTUM
Introduction:
The momentum of a moving object is defined as the objects mass multiplied by its velocity.
According to the law of Conservation of Momentum the total momentum does not change
when there is no external force. By usin
THE BALLISTIC PENDULUM
Introduction:
According to Newtons second law of motion, the total external force acting on a body or system
of bodies is equal to the time rate of change of linear momentum. If the external force is zero
the momentum remains const
MEASUREMENT
Introduction:
Much of the work in the physics laboratory involves measurements. Length, in particular, is a
fundamental concept in physical science. Numerical values for distance indicate how far or how
big an object is. The standard unit of
DYNAMICS
Introduction:
According to Newtons second law the force applied to a body of mass m and the resulting
acceleration are proportional according to each other according to the formula:
F = ma
During the experiment a car was placed in an air tracked
PH411
FORCE TABLE/VECTORS
The purpose of this lab was to gain experience with vectors quantity, and to analyze
the accuracy of the results by experiment.
Procedure: Performed procedure in the lab manual.
Sample Calculation:
There were several forces with
PH411
DYNAMICS
ThepurposeofthislabtostudyNewtonsSecondLaw.UsingNewtonsSecondLaw,we
observewhathappenstoanobjectsaccelerationwhentheforceappliedtotheobjectis
increasedbuttheobjectsmassremainsconstant.
Procedure: Performed procedure in the lab manual.
Check
PH411
COEFFICIENT OF FRICTION
The purpose of this lab was to investigated the kinetic and static friction forces
values acting on a wood block and on other materials.
Procedure: Performed procedure in the lab manual.
Sample Calculation:
Example:
# of
tria
Angular Motion-Rotational motion
Angular measure
We have already discussed angular velocity when we studied uniform circular motion
(UCM) and found that any object moving in a circle has a centripetal acceleration
directed toward the center of that circle
Conservation of angular momentum problems
1.
A ball is swung on a string at a velocity of 14 m/s and with a radius of 1.5 m. If the
radius is decreased to a value of 0.3 m, what is the new speed of the ball provided the
sum of the net external torques is
Free fall motion problems: (g=9.8 m/s 2)
1. A ball is dropped from top of a tall building. Determine the velocity of the ball 1
sec later.(9.8 m/s)
2. A stone is thrown upward with initial velocity of 30 m/s vertically upward.
Determine its velocity after
Graphical representation of motion:
Slope of displacement versus time graph= Velocity
Slope of Velocity versus time graph= acceleration
Area under velocity versus time graph = displacement
1.
A car starts from rest and accelerates at 4 m/s2 for 5 seconds
Momentum
An object which is moving has momentum. The amount of momentum (p) possessed by
the moving object is the product of mass (m) and velocity (v). In equation form:
p=mv
Since velocity is a vector, momentum also a vector.
Impulse-Momentum Change Equa
Newtons law of motion problems, Friction:
1. A crate weighing 9800 is pulled up a 37 0incline by a force parallel to the plane. If
the coefficient of kinetic friction between the crate and the surface of the plane is
0.7, what is the magnitude of applied
A Method for solving problems using Newton's Laws
1. Construct a big schematic diagram of the physical situation. While reading and rereading the
problem statement construct your diagram including every piece of information that you can
extract from the s
Projectile Motion
Projectile motion is an example of 2-D motion. It consists of independent
horizontal and vertical movements. You can write all kinematic equations in both
horizontal and vertical direction to solve for unknown parameters.
When faced with
Rotational Motion Problems:
1. An object, attached to a 0.5m string, does 4 rotations in one second.
Find its
a) Period
b) Tangential velocity
c) Angular velocity.
(0.25 s, 12.56 m/s, 25.12 rad/s)
2.
At t=5 sec, (a) what is the angular speed of the disk?
Torque
A torque is an influence which tends to change the rotational motion of an
object. One way to quantify a torque is
Torque = Force x lever arm
The lever arm is defined as the perpendicular distance from the axis of
rotation to the line of action of
Work done by variable force:
Work Energy relation
Wnet = K.Ef K.E.i
1. A 1 kg ball is thrown vertically upward with speed of 20 m/s. The air resistance of
the ball is proportional to the distance from the ground and is given by 2X in newtons,
Where x is t
Work
Definition: The work done by an agent exerting a constant force ( ) and causing a
displacement ( d) equals the magnitude of the displacement, d, times the component of
the direction of d. In Figure 5.1, the work done by is:
along
W = d Fcos .
Special