Purpose:

This experiment is intended to predict where a ball will land on the floor after rolling down a ramp on a table from different angles.

Procedure:

1. Assemble a sturdy ramp at a 30o angle on top of a table.

2. Predict where the ball will land.

3. Calculate the horizontal velocity of the ball at the base of the ramp.

4. Measure the vertical height of the table and the ramp using string, a measuring stick, and a plumb line.

5. Calculate the time that the ball will take to fall from the base of the ramp to the floor.

6. Calculate the range of the ball.

7. Tape a circle on the floor where you predict the ball will land.

8. Roll the ball down the ramp.

9. Measure how far the ball struck from the circle.

10. Measure the ball’s actual range.

11. Record the ball’s mass.

12. Calculate the ball’s potential energy at the top of the ramp.

13. Calculate the ball’s kinetic energy at the base of the ramp.

14. Calculate the mechanical energy lost by the rolling ball.

15. Use the energy lost to determine what angle the ramp needs to be positioned in order to hit the circle.

16. Calculate the time needed for the ball to reach the bulls-eye.

17. Measure the height from the base of the ramp to the floor.

18. Repeat Step 8.

19. Repeat steps 12-14.

20. Calculate the time the ball spent in the air during the second trial using kinematics.

21. Calculate the percent difference between the two trials.