Projector
Statement of the problem
This is a very simple two dimensional kinematic problem. A cannonball is
fired as shown in the above picture. We are looking for the displacement,
velocity of the cannonball.
The example file for this problem is called projector and can
be found in /Lab Software/Course Software/CoE Course Folders/ME240
Exercises
-
By moving the Slider or input a number in the box, set mass of B,
for example, 150 kg.
-
Set initial velocity of the ball to its maximum.
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Set the initial angle of ball equal to zero.
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Run the program until the ball hit the ground then Stop it.
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Reset program but do not Erase Track, repeat the procedure
1-4. But this time try different initial angle to see which angle gives
the ball maximum displacement in horizontal direction. According to your
textbook, the initial angle of
gives you the maximum displacement, is it true? Why?
-
Keep the initial angle as
and mass as 150 kg but reduce the initial velocity, what is the
difference from your observation?
-
Keep the initial angle as
and initial velocity as its maximum, but now reduce the mass, Does anything
change from your observation? Why?
Think Twice
If the initial velocity of cannonball is 
and its initial angle is 
, Can you find the velocity and position of cannonball as a function of
time in x and y direction? Also find the relation of displacements between
x(t) and y(t).
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