Proficiency #1
P- Does the mass of the toy car effect the distance a block off wood travels?
H- I believe that it would because when the car hits the wood it will move the wood a little bit farther and farther.
E-
Materials-
Ring stand
Tracks
Wood
Car
Meter stick
Steps-
1. Gather all materials
2. Put together four tracks
3. Tape tracks to ring stand
4. Put a block off wood at the end of the third track
5. Make a table in excel
6. Put car at top
7. Let go of car
8. Record how far the block goes with a meter stick
9. Leave the block in the same place
10. Repeat steps 6-9
11. Make sure all data is recorded
12. Clean up
Cv : the tracks, the ring stand, the block of wood, the car, the meter stick
Iv: wood in different place each time
Dv: how far the block of wood is moved
Control: the car
O-
car 1 car 2
trial 1 4 5
trial 2 4 5
trial 3 5 5
C- Yes the mass of the toy car effects the distance the block of wood will go. If the car has more mass it will come down the slope faster than a car with lower mass. With one car having more mass will have it come down faster because of gravity and with it being on a slope it can then go faster. The mass of car 1 is less than the mass of car 2 so car 2 will move the wooden block farther.
Proficiency #2
P- Does the surface of the track affect the time it takes for a marble to travel to the bottom?
H- I believe that it will because if you have a smooth surface it will go faster versus a surface that has a rough surface.
E-
Materials-
Marble
Different surfaces
Timer
Two books
Steps-
1. Gather all materials
2. Make excel
3. Set up both books
4. Lean the plate of different surfaces on the books
5. Set marble at top
6. Have timer ready
7. Record time that it takes the marble to get down
8. Repeat steps 5-7 about three more times
9. Record all data
10. Clean up
Cv: same marble, same plate, same books, and same timer
Iv: different surfaces for each test
Dv: the speed of the marble
Controlled: the marble
O-
surface 1 surface 2 surface 3 surface 4
trial 1 time 0.37 0.42 0.38 0.38
trial 2 time 0.43 0.47 0.38 0.39
trial 3 time 0.35 0.42 0.37 0.36
C- The first surface is just like cardboard and trial 1 and trial 3 were around the same but for some reason trial 2 had a faster. I think the reason might be that I did not stop the timer at the correct time when the marble went to the bottom. For the second surface I believe it was sandpaper. The times are pretty close in time. More than likely the reason it took longer is because the sandpaper has grit on it which could ultimately slow the marble down.
For surface three and four the times were basically the same. The only reason they were the same is because the two surfaces were cork and a foam like material.
Proficiency #3
P- Does the mass of a car affect the deceleration?
H- I believe that it will because if the car is bigger and it is going down a slope that it will go slower but not by much.
E-
Materials
Tracks
Ring stand
Three different cars
Timer
Tape
Steps-
1. Gather all materials
2. Put together four tracks
3. Make a tape mark and the end of the third track
4. Tape one end of the track to the ring stand
5. Make an excel
6. Place car at top
7. Make sure timer is ready
8. Let go of car and at the same time start the timer
9. Stop timer when the car hits the tape
10. Record all data
11. Repeat steps 6-10 two more times
Cv: the car, tracks, ring stand, tape, timer
Iv: different cars
Dv: the deceleration of the car
Control: the cars
O:
car 1 car 2 car 3
test 1 0.41 0.43 0.54
test 2 0.45 0.44 0.51
test 3 0.49 0.41 0.0.58
C- Yes the mass of the toy car will affect the deceleration. The only reason it will is because of the fact that if it has more mass than the other cars than the gravity will pull the car down more than it will be going fast down a small incline. For the first to cars they had about the same times in each trial because the cars did not have a big difference in mass unlike the third car.
Rube Goldberg Explanation
1. The film canister is dropped into the cup
2. The weight of the canister will make the other cup rise
3. When the other cup rises it drops batteries
4. The batteries hit the ball
5. The ball rolls and hits the book
6. After it hits the books the domino comes in effect
7. The momentum of the books falling makes it hit the last book
8. The last book has a knife attached to it
9. The knife will then fall and cut the duck
