Ball Bounces Lab Report

To make the results of the experiment valid four variables to take into account are if the freezer is the same temperature for both tests, the water is the same water just different temperatures, the ice cube trays are the same size, and finally both trays are in the freezer for the same amount of time.

For example a tennis ball will bounce higher than a soccer ball because it has more air pressure and it is harder.

The dependent variable was the distance each plane flew, this was measured in inches using a 16 foot tape measurer. There were three controlled variables, the first was the size and weight of the paper airplanes with the paper clip attached, I used the same size paper, paper airplane design, and the 28mm paper clip for each plane. The second starting position where I stood, I marked a designated position to stand at and threw the planes with my right foot at the starting line each throw. The final controlled variable was how the planes were held and thrown, I held each plane at the center of the plane and threw with my right arm.

The ball uses this kinetic energy to move up the usually 6 to 7 degree incline to the top of the playing field. The kinetic

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

9. The total energy is constant for most of the time until the ball is released and caught up and down in free fall, because extra force of the person actions changes the energy. The energy should remain constant because the kinetic and potential ratio energy

Hold one ball beside the top of the meter stick so it does not touch. Drop the ball. Have your partner record the height of the first bounce.

the type and condition of the ball, the speed of the pitch, swing speed, type of bat, and air

direction from where you can read them. The vials should not be shifted during the experiment and your

The topic for science fair is on blood spatter. If terminal velocity and height van affect the radius of a blood spatter print. To figure out whether after a blood splatter reaches terminal velocity and it starts to slow down will the radius start to become decrease. In this experiment the independent variable is the height the blood is dropped from, and the dependent is the radius of the blood spatter. Independent and dependent variables: The independent variable is the amount of sugar in each solution and the dependent variable is the levels of vitamin C the solution has.

Before the ball bounces in the ground the air pressure inside the ball is the same in all the ball

dependent variable- how far i will hit each ball due to what bat i use.

Lastly, the launch angle also has a great effect on the distance traveled. If projected at 90° the ball would only be thrown vertically upwards and back down to the person. There would be no horizontal change in position but a great maximum height. The greatest horizontal distance is reached between 40° and 50°. For this reason the launch angle affects the

Rigel and the other children were playing in the yard. Rigel had announced “everyone grab a ball and come in the shade!” All the children had grabbed one ball before they raced to the large shaded area. Rigel announced “everyone sit on your ball and bounce!” All the children sat on their balls and bounced up and down. Some of the children were unable to sustain their balance and ended up falling off their balls. Rigel was able to sustain his balance. He was able to bounce on his ball while moving around the shaded area. If he had bounced too much he would fall of his ball but he would just get right back up and would begin bouncing again.

by, F=P/Dt. By increasing the time over which you decelerate the ball, you lessen the force (Bill Willis 2001). This increase of ‘stopping” time will make it easier to catch and control the ball.