This preview shows pages 1–2. Sign up to view the full content.
1 of 5
[
Print View
]
Class PH1110A2007
Assignment 4
Due at 5:00pm on Friday, August 31, 2007
View
Grading
Details
Introduction to Projectile Motion
Learning Goal:
To understand the basic concepts of projectile motion.
Projectile motion may seem rather complex at first. However, by breaking it down into
components
, you will find that
it is really no different than the onedimensional motions that you have already studied.
One of the most often used techniques in physics is to divide two and threedimensional quantities into components.
For instance, in projectile motion, a particle has some initial velocity
. In general, this velocity can point in any
direction on the
xy
plane and can have any magnitude. To make a problem more managable, it is common to break up
such a quantity into its
x
component
and its
y
component
.
Consider a particle with initial velocity
that has magnitude 12.0
and is directed 60.0
above the negative
x
axis.
Part A
What is the
x
component
of
?
Express your answer in meters per second.
ANSWER:
=
6.00
Part B
What is the
y
component
of
?
Express your answer in meters per second.
ANSWER:
=
10.4
Breaking up the velocities into components is particularly useful when the components do not affect each other.
Eventually, you will learn about situations in which the components of velocity do affect one another, but for now
you will only be looking at problems where they do not. So, if there is acceleration in the
x
direction but not in the
y
direction, then the
x
component of the velocity will change, but the
y
component of the velocity will not.
Part C
Look at
this applet
. The motion diagram for a projectile is displayed, as are the motion diagrams for each component.
The
x
component motion diagram is what you would get if you shined a spotlight down on the particle as it moved
and recorded the motion of its shadow. Similarly, if you shined a spotlight to the left and recorded the particle's
shadow, you would get the motion diagram for its
y
component. How would you describe the two motion diagrams
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 04/29/2008 for the course PH 1110 taught by Professor Kiel during the Fall '08 term at WPI.
 Fall '08
 Kiel
 Projectile Motion

Click to edit the document details