La Historia De Mari Conazo

Juan Velasquez
IB Physics SL
Spit Wad Lab
How does the angle from which the spit wad is thrown affect the distance it reaches?
A spit wad is a small piece of paperwadded up and chewed on a bit. It is put in one end of a straw and shot by blowing on the straw. To throw a spit wad there are many variables, thus this lab will onlyfocus on the angle at which the spit wad is thrown from the straw, to see how the distance it travels before hitting the ground is changed and/or affected due to differentangles of the protractor.
Materials:
* Straws
* Paper
* Scissors
* Protractor
* Tape Measure
* Tape

Independent Variable: Angle of strawwhen the spit wad is thrown.
Dependent Variable: Distance reached by the spit wad after thrown.
Control Variables: Mass of the spit wad, Length of the straw, Height atwhich it is thrown And Force of the blow.
Procedure:
1. Cut with the scissors carefully 5 squares of 1cm2 in a piece of paper.
2. Fold the squares symmetrically 3times.
3. Chew on the folded squares for 2-3 seconds.
4. Use the tape to attach the straw to the protractor at the desired angle (Leave 1-2 cm of straw at thebottom of the protractor to be able to blow on it).
5. Crouch so that the end of the straw is approximately 1 meter from the ground and make sure that the protractor ishorizontal.
6. Place one of the folded and chewed spit wads in the straw, and with moderate force blow on it.
7. Record in data table using the tape measure: howfar it travelled and the angle at which it was thrown.
8. Remove the straw that was attached to the protractor.
9. Repeat steps 4-8 with different angles.