Materials Procedure One golf ball #1. Determine the mass of the golf ball in grams, and then convert to kilograms. Record the data in the first two columns of the data sheet. #2. Calculate the weight of the golf ball in Newtons and record it in the third column. #3. One student in each group will hold the meter stick, while the other holds the golf ball one meter high. Record the height of the dropped ball in the fourth column of the data sheet. #4. The student holding the ball drops it, and another student measures how high it bounces back up. Record the height of the bounce on the data sheet in the fifth column.. #5. Calculate the gravitational potential energy (GPE) of the ball before the drop and after you drop it using the following formula: GPE = Weight (N) Height (m) or GPE = Mass (kg) * Gravity (m/s2) * Height (m) #6. Calculate how much energy was lost during the bounce (GPE start - GPE finish). Where did all the energy go? Data: Trial Mass (kg) Force of gravity (N) Height of ball dropped (m) Height of first bounce (m) GPE before drop (J) GPE after bounce (J) Energy lost (J) #1 #2 #3 #4 #5 Calculations: #1. What type of energy should all of the gravitational potential energy have been converted to right before the ball hits the ground? #2. Calculate the velocity of the ball right before it hits the ground for each trial. Use the assumption that GPE at the top = KE at the bottom (KE = 1/2mv2): Trial GPE Velocity of ball before it hits the ground #1 #2 #3 #4 #5 Questions #1. Do your results support the law of conservation of energy? Why or why not? #2. If not, where could have the energy gone in this experiment? #3. Calculate how much work was done by friction for each trial, the displacement of the ball (Think about how far the ball traveled between your height measurements), and the force of friction on the ball. Trial Loss of GPE Work done by friction Displacement of ball Force of friction #4. Is there any way to measure this loss of energy in this experiment? (hint what form does this energy transform into