PHYSICS
INTERNET PROGRAMS
PROJECTILES
NAMES: _______________________________
Log onto a computer and go to the following website.
http://www.ngsir.netfirms.com/englishhtm/ThrowABall.htm
Experiment #1
Set the platform height to 100 m. Set the projection Angle to 0. Vary the launch speed from 0
m/s to 55 m/s in increments of 5 m/s. Record the ranges in the Data Table below.
Launch Speed
0
5
10
15
20
25
30
35
40
45
50
55
Time
Range
Experiment #2
Set the platform height to 0 m. Set the launch speed to 50 m/s. Set the projection Angle to 0.
Vary the platform height from 0 m to 200 m in increments of 10 m. Record the ranges in the
Data Table below.
Platform Height
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
Time
Range
Experiment #3
Set the platform height to 0 m. Set the launch speed to 50 m/s. Vary the projection angle from 0
to 90 in increments of 90. Record the ranges in the Data Table below.
Projection Angle
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
Time
Range
Log onto the following website.
http://jersey.uoregon.edu/newCannon/nc1.html
The First Challenge
What angle got a hit?
__________
The Second Challenge
What velocity got a hit?
__________
The First Third Challenge
Find 10 different firing solutions. You will have to click the back arrow to take subsequent
shots. Record your results in the chart. Then plot these as a velocity v angle graph.
Velocity
Angle
The Second Third Challenge
Given that we have more surface area being shot into the wind, where do you think the new
firing solutions will lie in this diagram?
Find 10 different firing solutions. You will have to click the back arrow to take subsequent
shots. Record your results in the chart. Then plot these as a velocity v angle graph.
Velocity
Angle
The Fifth Challenge
Find 10 different firing solutions. You will have to click the back arrow to take subsequent
shots. Record your results in the chart. Then plot these as a velocity v angle graph.
Velocity
Angle
Which do you think is the bigger effect, increasing the radius of the projectile by a factor of 1.5
or increasing the density of medium in which the projectile propagates by 1.5?
The Sixth Challenge
Why is the time of flight so much longer in this scenario compared to the previous ones?
What is the approximate value of the X-velocity in this case?
What is the approximate horizontal range of this projectile fired under these conditions?
What is happening to the Y-velocity in particular?
Suggest a reason that a) you are seeing this funny behavior in the Y-velocity and b) why the time
of flight is so much less.