Background Information * Newton's first law:A scientific law stating that objects at rest remain at rest, and objects in motion remain in motion with the same velocity unless acted on by an unbalanced force. * Newton's second law: a scientific law stating that the acceleration of an object increases with increasedr force and decreases with increased mass.
Hypothesis If we build rocket launchers with different sized bottles then the bottle that is bigger will travel with greater distance because the bigger the bottle the more air pushing the straw.
Procedures 1. Make a data table like the one shown on the sample notebook page.
2. Insert the straw with the smaller diameter into one of the bottles. Seal the mouth of the bottle tightly with modeling clay so that air can escape only through the straw. This is the rocket launcher.
3. Cut two thin strips of paper one about 8 cm long. Connect the ends of these rips to make loops.p
4. To create the rocket place the straw with the larger diameter through the smaller loop and tape the loop to the straw at one end. Attach the other loop to the other end of the straw in the same way . Both loops should be attached to the same side of the straw to stabilize your rocket in flight. 5. )Use a small ball of modeling clay to seal the end of the straw near the smaller loop.
6.) Slide the open end of the rocket over the straw on the launcher. Place the bottle on the edge of a table so that the rocket is pointing away from the table. 7.) Test launch your rocket by holding the bottle with two hands and squeezing it quickly. Measure the distance the rocket lands from the edge of the table. Practice the launch several times. Remember to squeeze with equal force each time.
8.) Launch the rocket four times. Keep the amount of force you use constant. Measure the distance the rocket travels each time, and record the results in your data table. 9.) List all the variables that may affect the distance your rocket flies. Change the rocket or launcher to alter one variable. Launch the rocket and measure the distance it flies. Repeat three more times, and record the results in your data table.
In Conclusion our data does not support our hypothesis because the smaller bottle flew further than the bigger bottle. My group and I had predicted the launcher would go further with the bigger bottle but we were wrong.