Transcript Projectile motion: a secret mission

Projectile motion
Example of projectile motion
# A projectile is any object upon which the only force is gravity;
# Projectiles travel with a parabolic trajectory due to the influence of gravity;
# There are no horizontal forces acting upon projectiles and thus no horizontal acceleration;
# The horizontal velocity of a projectile is constant (a never changing in value);
# There is a vertical acceleration caused by gravity; its value is 9.8 m/s2, down.
PhysicsClassroom.com
Objective #1:
predict where an obstacle should be placed in order to have a projectile go
+
through an opening of a certain height.
- measure: H, h, X
- calculate: d = ?
-
y
0 v0x
x  x0  v0 x  t
1
y  y0  v0 y  t  a  t 2
2
H
x
t
d=?
h
Particular equations
1
y   H   g  t 2f
2
+
-
General equations
x  X  vox  t f
0
X
tf = ?
vox= ?
Use general equations again to determine particular equations
and solve for d = ?
-g
tf
Objective #2:
calculate where the projectile will strike the floor when
slide is at an angle
- measure: a, d, H
- calculate: X = ?
x  x0  v0 x  t
a
y
v0y
General equations
v0
a
v0x
d
t
1
y  y0  v0 y  t  a  t 2
2
x
H
tf
Particular equations
X=?
x  d  vox  t  vo cos a   t
1
1
y  0  voy  t  g  t 2  vo sin a   t  g  t 2
2
2
vo= ?
Determine particular equations again and solve for X = ?
Record distance X also experimentally by removing the small table; compute % difference
after calculations for theoretical value X.
Use worksheets provided to gather data for experiment
Calculate distance to obstacle in experiment # 1
Calculate & measure experimentally where will the
projectile strike the floor in experiment # 2
Good luck!