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FREE FALL VERTICAL MOTION |
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After you have completed the following questions, assess your answers
with the animations displayed at the end of this web page. Think about
throwing a ball vertically into the air. Throw an
object up and observe its motion. What physical
quantities are important in describing the motion of the ball? A ball is launched vertically from a cannon at an initial speed
of 50 m.s-1.
Calculate the time
for the ball to reach its maximum height and the time for it to return to its
launch height.
Calculate the displacement
of the ball at the instant it reaches the highest point in its trajectory.
At the balls
highest point, it stops momentarily. What is the acceleration of the ball at
this instance?
Calculate the
times at which the ball has a displacement of 100 m. What are the velocities
at these times?
Draw three graphs
with scaled axes (using your above answers) for the motion of the ball.
Use your v/t graph to determine
the acceleration of the ball.
Use your v/t graph to determine
the maximum height reached by the ball. Check your answers using the animation shown below. |
The animation
was created using the MATLAB mscript spAcc.m
MATLAB Scripts
can be down loaded from
http://www.physics.usyd.edu.au/teach_res/mp/mscripts/
If
you have any feedback, comments, suggestions or corrections please email:
Ian
Cooper School of Physics University of Sydney
ian.cooper@sydney.edu.au