1. Set up the meter stick so it is securely held perpendicular to the floor (perhaps against a wall) or perpendicular to the surface of a flat table. 2. Drop the ball from heights starting at 1.0m and decreasing by 0.1 m each time down to 0.1 m. Record the height of the first bounce. 3. Repeat step 2 three more times. Observations Drop Trial 1 Trial 2 Trial 3 Trial 4 Average Height Rebound Rebound Rebound Rebound Rebound 1.0 m 0.9 m 0.8 m 0.7 m 0.6 m 0.5 m 0.4 m 0.3 m 0.2 m 0.1 mAnalysis Drop Average | Initial Final MKE MKE Change Speed Speed Height Rebound GPE GPE before after in MKE before after (rebound) bounce bounce bounce bounce 1.0 m 0.9 m 0.8 m 0.7 m 0.6 m 0.5 m 0.4 m 0.3 m 0.2 m 0.1 m Calculations: The acceleration of any falling object due to gravity is 9.8m/2. Gravitational Potential Energy (GPE) is the product of the mass of the object, the acceleration due to gravity, and the distance of the object from the ground (GPE = mgh)--in this case, the mass of the ball, the acceleration due to gravity, and the height of the ball when it is dropped (for the initial GPE) or the height of the rebound (for the final GPE). The Mechanical Kinetic Energy (MKE) is, algebraically, one-half the product of the mass and the square of the velocity (MKE = 1/2mv2)-- in this case, the MKE before the bounce is equal to the initial GPE, and the MKE after the bounce is equal to the final GPE. So if you fill that in on your table, you can set the appropriate MKE equal to 1/2mv2, and solve for v to find your speeds.Materials Meter stick, high bounce ball, small platform scale (such as a postage scale or an inexpensive kitchen scale) Procedure 1. Set up the meter stick so it is securely held perpendicular to the oor (perhaps against a wall) or perpendicular to the surface of a at table. 2. Drop the ball from heights starting at 1.0 m and decreasing by 0.1 m each time down to 0.1 m. Record the height of the rst bounce. 3. Repeat step 2 three more times