Adding Vectors Graphically and Component Method
Objective
To learn how to add vectors graphically and component method and compare with
expected resultant vector.
Equipment
1. protractor
2. ruler
3. paper
4. force table
5. set of masses
6. triple-beam bal
1. What are (a) the x component and (b) the y component of a vector a in the xy
plane if its direction is 250 counterclockwise from the positive direction of the x
axis and its magnitude is 7.3 m?
5. A ship sets out to sail to a point 120 km due north. An
CLASSICAL MECHANICS (WHAT IS IT?)
The main problem of classical mechanics is to use its laws
and principles to describe the motion (position and velocity)
of a body at any time given some set of initial conditions.
The laws of Classical Mechanics (especia
Collisions
Def: A collision is an event in which 2 or more objects
interact for a very short period of time. During this time, the
external forces (if any) on the system are much smaller than
the internal impulsive forces between the objects and thus
can
Spring Force
How do we calculate the work done by a non-constant force? Before we answer
the question lets consider the spring force which is an example of a nonconstant force.
Consider the following Spring-Mass System.
a) Note that the spring force Fs is
SCALAR (DOT) PRODUCT
Before we define work in physics we need to first define the scalar (dot) product between
two vectors. The reason for this is because we will define work in terms of the scalar (dot)
product between the force vector and displacement v
POTENTIAL ENERGY
Often the work done on a system of two or more objects does not change the kinetic energy of
the system but instead it is stored as a new type of energy called POTENTIAL ENERGY. To
demonstrate this new type of energy lets consider the fol
VECTORS
DEF: A vector is a quantity that has both magnitude and direction.
DEF: A scalar is a quantity that has magnitude but NO direction.
Ex.
Vectors
Force
Velocity
Displacement
Momentum
Ex.
Scalars
Temperature
Time
Mass
Speed
Vector Notation
A Boldface
Chapter 4 Homework Problems Solution
13. A particle moves so that its position (in meters) as a function of time (in seconds) is
r i 4t 2 j t k . Write expressions for (a) its velocity and (b) its acceleration as functions
of time.
21. A dart is thrown ho
Physics 2A Even Problem Answers
Chapter 2
2. (a) 1.74 m/s; (b) 2.14 m/s
4. 48 km/h
28. a)5.00 s b)61.5 m c) graph
30. (a) 2.5 s
36. (a) 56.6 s; (b) 31.8 m/s
38. (a) 32.9 m/s; (b) 49.1 s; (c) 11.7 m/s
60. 26 m
64. (a) 8.0 m/s2; (b) 20 m/s
66. (a) 0.13 m; (
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Physics 2A Lecture Final Review
1. MOTION IN 1-D
a) Understand the terms and concepts required to describe the motion of a particle
moving in one dimension.
b) Know how to use the kinematic equations to describe the motion of an object moving
with constan
DO NOT TURN THIS PAGE!
Name: _
Physics 2A
Winter 2010
Exam 3
MAKE SURE TO SHOW ALL WORK IN COMPLETE DETAIL! NO CREDIT WILL BE GIVEN IF NO
WORK IS SHOWN! EXPRESS ALL ANSWERS IN SI UNITS.
1. A bead slides without friction around a loop-the-loop as shown bel
MEASURING YOUR REACTION TIME
Objective
1. Calculate your reaction time and compare to the reaction time of the class.
2. Compare the reaction time of males and females in the class.
3. Compare the reaction time in terms of age for the class.
Equipment
1.
MEASUREMENTS AND ERROR ANALYSIS
Objective
1. To learn how to use the following measuring devices and understand the
uncertainties associated with them.
a) meter stick
b) metric ruler
c) triple-beam balance
d) digital balance
e) vernier calipers
2. Calcula
MEASUREMENTS AND ERROR ANALYSIS
Objective
1. To learn how to use the following measuring devices and understand the
uncertainties associated with them.
a) meter stick
b) metric ruler
c) triple-beam balance
d) digital balance
e) vernier calipers
2. Calcula
CENTRIPETAL ACCELERATION
OBJECTIVE
To calculate the net force on an object moving in uniform circular motion and compare
with the expected value.
THEORY
A. Mass Rotating in Uniform Circular Motion
Consider the Centripetal Force Apparatus below. The mass M