parknlyss

Goal: How much energy is lost after a bouncy ball is dropped from different heights.

Procedure: 1. Get a bouncy ball 2. Find the mass of the ball 3. Drop the ball from 1 meter off the ground 4. Find the initial velocity 5. Find the final velocity 6. Find the initial kinetic energy 7. Find the final kinetic energy 8. Determine how much energy was lost

__1 METER__
Initial Velocity: 0.593 Final Velocity: 2.421 Initial Kinetic Energy: 0.010 Final Kinetic Energy: 0.167

Initial Velocity: -2.214 Final Velocity: -0.926 Initial Kinetic Energy: 0.1397 Final Kinetic Energy: 0.0244

Energy Lost: 0.167-0.1397=0.0273

__80 CENTIMETERS__


Initial Velocity: 0.599 Final Velocity: 3.012 Initial Kinetic Energy: 0.0102 Final Kinetic Energy: 0.2586 Initial Velocity: -1.913 Final Velocity: -0.739 Initial Kinetic Energy: 0.1043 Final Kinetic Energy: 0.0156

Energy Lost: 0.2586-0.1043=0.1543

__60 CENTIMETERS__
Initial Velocity:0.598 Final Velocity: 2.359 Initial Kinetic Energy:0.0102 Final Kinetic Energy: 0.1586

Initial Velocity:-0.201 Final Velocity: -0.303 Initial Kinetic Energy: 0.0012 Final Kinetic Energy: 0.0026

Energy Lost: 0.1586-0.0012=0.1574

== __Conclusion:__ || After dropping a tennis ball from different heights, about 0.155 Joules of energy is lost after the first bounce. We discovered this by finding the mass of a tennis ball. Then we dropped the ball from different heights off the ground, starting at 1 meter, then 80 cm, and then 60 cm. We used LoggerPro to find the initial and final velocities of the ball as it hit the ground and right as it bounced back up. After getting the velocities, we used the kinetic energy equations to solve for the initial and final kinetic energy of the ball as it hit the ground and right as it bounced back up. We used the kinetic energy calculations and subtracted the final kinetic energy of the ball hitting the ground and the initial kinetic energy of the ball bouncing back up. For all 3 trials, we got approximately 0.155 Joules of energy lost after the first bounce. This means that the ground did about 0.155 Joules of work on the ball.