basic information about projectile

1. What is Projectile
Motion?

2. Instructional Objectives:
• Students will be able to:
– Define Projectile Motion
– Distinguish between the different types of
projectile motion
– Apply the concept to a toy car and measure its
velocity

3. Projectile Motion
• Two-dimensional motion of an object
– Vertical
– Horizontal

4. Types of Projectile
Motion
• Horizontal
– Motion of a ball rolling freely along a
level surface
– Horizontal velocity is ALWAYS
constant
• Vertical
– Motion of a freely falling object
– Force due to gravity
– Vertical component of velocity
changes with time
• Parabolic
– Path traced by an object accelerating
only in the vertical direction while
moving at constant horizontal velocity

5. Examples of Projectile
Motion
• Launching a Cannon ball

7. Equations
• X- Component
• Y- Component
• Vectors
tvxx xiif 
gtvv
ygvv
gttvyy
yiyf
yiyf
yiif



2
2
1
22
2
)sin(
)cos(


iyi
ixi
vv
vv


Note: g= 9.8
m/s^2

8. Factors Affecting
Projectile Motion
• What two factors would affect projectile
motion?
– Angle
– Initial velocity
Initial Velocity
Angle

9. Class Exercise
An object is fired from the ground at 100
meters per second at an angle of 30
degrees with the horizontal
Calculate the horizontal and vertical
components of the initial velocity
After 2.0 seconds, how far has the object
traveled in the horizontal direction?
How high is the object at this point?

10. Solution
• Part a
• Part b
• Part c
   ms
s
mtvx
t
x
v
x
ix
1740.287 



  
   s
m
s
mvv
s
m
s
mvv
iiy
iix
5030sin100sin
8730cos100cos
0
0




       2
2
2
0.28.9
2
1
0.250
2
1
s
s
ms
s
mtgtvy iy 

11. Applications
Any Ideas?

12. THANK YOU