Occam's razor: The simplest explanation is usually the right one. Oct 18­1:18 PM
Unit 3
Motion in 2-Dimensions
Projectile, Circular and Relative Motion
Oct 16­8:09 AM
What are the characteristics of
projectile motion?
Oct 18­1:16 PM
Watch as I launch a ball.
What would it look like
-- if you were standing behind the launcher
-- if you were looking down from the ceiling
Oct 18­12:03 PM
These are terms that we show up in lots of projectile
problems.
Explain what they mean in terms of the launched ball
(a picture might be helpful).
launch angle
initial speed
initial height
range
final height
time of flight
Oct 16­8:25 AM
Draw a force diagram for the ball at
the different points of its trajectory.
What causes the vertical
component of acceleration?
What causes the horizontal
component of acceleration?
Oct 16­8:12 AM
2D Motion Lab Lite
Oct 20­11:27 AM
Page 164: 33, 34, 35, 44
Oct 24­7:27 AM
Oct 24­7:29 AM
Oct 24­7:29 AM
Oct 24­7:30 AM
Oct 24­7:30 AM
What does this imply about the components
of the acceleration of a projectile?
How can this help us solve kinematics
problems about projectiles?
Oct 18­12:08 PM
Remember --
x = xo + vot + ½at2
v = vo + at
v2 = vo2 + 2aΔx
Oct 18­12:19 PM
i direction
j direction
ax = 0
ay = -g
x = xo + voxt
y = yo + voyt - ½gt2
vx = vox
vy = voy - gt
vy2 = voy2 - 2gΔy
Oct 16­8:18 AM
What are the characteristics of projectile motion?
How can you tell if this is Real or Fake?
The FraggleRox. Full Version Crazy Insane Water Slide. YouTube. Web. 10/29/09
Oct 30­8:22 AM
Courtney kicks a soccer ball at rest on level ground giving it
an initial velocity of 7.8 m/s at an angle of 32o.
a) How long will the ball be in the air?
b) How high will the ball go?
c) What will be its range?
Oct 19­8:37 PM
A dart player throws a dart horizontally at 12.4 m/s. The
dart hits the board 0.32 m below the height from which it was
thrown. How far is the player from the board?
Nov 1­7:43 AM
A basketball player is trying to make a half-court jump shot
and releases the ball at the height of the basket. Assuming
that the ball is launched at 51o, 14 m from the basket, what
speed must the player give the ball?
Nov 1­7:45 AM
Chapter 6.1
Page 165: 51, 52, 53, 56, 58
Oct 19­8:43 PM
Projectile Motion Guided Practice Answers
1a) 0.53s
1b) 0.45 m
1c) Vx = 0.84 m/s Vy = -5.19 m/s
2a) 8.6 m
2b) yes
3) 1.9 m
5) 0.018 m
6) 43.5 m
Oct 26­8:36 AM
Attachments
Snow_Tow.wmv
Newtons_Third_Law_script.doc
Group Worksheet Newton's Third Law.doc
vector componet guided practice.doc