Here is sample data of a variety of projectiles thrown on a football field. Just by measuring the total flight time and range we can tell anything we need about its
velocity. I've also included a blank lab sheet to try this yourself if you are so inclined.
1. We know from kinematics that the time-up
is equal to the time-down.
4. The Velocity in the Y direction is simply
Time-Up times g or 9.8.
3.The Velocity in the X direction is found by
taking the range and dividing it by the total
5. Finally, initial velocity is found using the
Pythagorean Theorem A2 + B2 = C2 where
Velocity-X is A, Velocity-Y is B and C is the
6. AP or Honors students could go further and calculate the angle using sin, cos