1st one is acceleration, 2nd is friction, 3rd is newtons laws and fourth one is speed experiment
One problem is that how does the texture of the tracks affect how fast the marble goes.
Problem: How does the texture of the tracks affect how fast the ball goes, from saw dust, sand, mixture and nothing on the tracks.
Hypothesis:I think that the one with nothing will happen, because of the friction that their is none.
Observations: The marble would slow down if it hit a bigger patch of saw dust or sand, nearly stopping.
Variables: IV: The time of the marble
CV: The tracks/ blocks, the marble, dominos, and the amount of dominoes, The length between the dominoes, place of the dominoes, and height of which the marble was dropped on the track.
DV: The texture of the track
Materials:Marble, tracks, dominoes, floor/ space to use,sand sawdust, timer, and blocks for the tracks.
Graph and table:
Conclusion: My hypothesis was that the one with no texture to the tracks and I was correct. The reason I was correct is that the texture also has resistence to the marble. So its like riding a bike. Would you rather ride on amooth rode or a gravel road. I would pick the smooth rode, because it's easier and also it's has less resistence/ texture. I have had former experiences with these things. If I was riding my bike I would rather take the bumpier shorter route than the longer smooth route, because I would get to the place faster. So texture really matters in this experiment.
How eliminating external variables:
I eliminated external variables by using the same amount of dominoes. I used a ruler to make sure that they were exactly the same distance apart. Also that the marble was dropped at the height. By making sure that when I did drop the marble that it was at directly the top of the track. Another one is the track, it has to be the same way everytime. So what I did is lay pieces of clear tape where I put the tracks before, thus eliminating another external variable. One more is the placement of the dominoes once again I used clear tape to mark where each of them were. The last one is the amount of sand and sawdust I used exactly 1 teaspoon of each and when I used both of them I used a half a teaspoon and evenly put it on the tracks. Thus eliminating the last external variable.
Persuasive paper on How alternate forms of energy can be utilize to influence the united states energy need:Picture a place with no power. No TV, lights, clocks, or anything electric. That life would be terrible and that we would have no cures for diseases or places with air conditioning. That life would be terrible and would happen if we relied on one power source. Then when that power source went out or it broke, that life could happen if it did not get fixed. That’s why it's great we have so many alternate sources of energy from dams, solar panels, or simply wind energy.
We have come up with ways to make the simplest things into energy like from water or the wind. Why don't we use them? There are so many good things that can come out of the new energies. Plus if we were not going to use them, then why did we come up with them. It then must have been to you a complete waste of money, well it is not a complete waste of money. Like when the power goes out what do you do. Most people would just sit there and wait. Well if you had solar panels on the roof then if you saved the energy from that you would have a lot of power that will last you until it goes back on. Or if a tree falls on the power line then if you have a small wind mill in you back yard then you would have a lot of energy too. And yes, I know that it costs a lot of money, but it's worth it in the long run. Or if you want to stop paying the electric bill well then you can use those tools to have energy, then your bill will go down, because you are not using as much energy as when you did not have it. Let's say you have a fast flowing river in your back yard and you want have a part that is not fast flowing then you put a dam in and the not only do you have a nice place to swim but aso you have energy for your house.
And some people say we can do it, but they don't say how we can. But now we do have a way we can use these alternate forms of energies to help us with the United States energy problems. We need to use these alternate energies in some of these ways, and we can come up with more we need to put some money into it.
Rube gold berg:How simple machines utilize mechanical advantage to transfer energy.
How: first a car would go down the ramp hitting the pulley. Which hits the domino thus making the marble go down the incline planes to the dominoes which hit the levers/ wheel and axels. Then hitting the wood dominos and then knocking the milk carton over thus dumping the water into the bow thus giving the dog water.
The pulley was the one that the track hit and then it hit the domino of which makes the marble fall into the tracks. This is a fixed pulley, because it is attached to something that does not move and it stays in place the whole time.
The ramp is the one with the car that begins it by hitting the pulley.
The incline planes are the tracks if you see they are slanted down partially you may not see it that creates a mechanical advantage by using it rather than having a straight track and having to push it after every one.
The lever is the mouse trap. The spring is the fulcrum and the bar creating the resistance over the force.
The wheel and axel is the mouse trap to the spring is the wheel and the axel is the meat pieace underneath and around the spring.
Energies:
Dominos/ wood: Potential energy, because of the energy of motion of the dominos
Marbles: Mechanical energy, that it has the movement energy and gravitational energy
Car: Potential, gravity makes it move down the ramp
Mousetraps: Has kinetic energy of the movement of the springs
Newtons laws: How Newton’s laws apply to the physical world
Problem: Does the mass of the marble affect the time of the dominos knocking over?
Hypothesis: I think that the highest mass of marble will have a faster time, because of the fact of gravity have a greater force.
Materials: timer, marble track, 3 marbles different size, 24 dominos, and computer
Procedure:
1. Gather all materials
2. Set up tracks and dominos
3. Roll marble down track, while recording with the timer
4. Record time
5. Set up dominos again
6. Repeat steps 2-5 with the other marbles 3 times
7. Create table
8. Create graph
9. Write conclusion
10. Write paragraph on external variables
11. Clean up
CV: the tracks, dominos,
DV: mass of marble
IV: time of dominos
Control: where the marbles go
Conclusion: My hypothesis was that the bigger marble will go faster than the two other smaller marbles. I was correct. The dominos went faster, because of the fact that gravity made the marble go faster and that it had more force. Another reason is that the smaller marbles had less gravity force so it did not have as good as a acceleration or speed going down the track. So when the marble hit the domino it did not go as fast as the bigger marble. Also that the marbles had not as good as a start, it took longer for it to get going.
External Variables:
I eliminated them by having everything measured out and the same as it was when we started each trial. The tracks had to be the same and the length between them as well. How did this is I had to mark the tacks with tape to make sure they stay the same. Also for the dominos had to be in the exact same place I put a small piece of tape by every marble to make sure they are at the exact same place.
1st law: the dominos remain in rest until the marble hits it
2nd law: is the force of acceleration of the marble hitting the dominos
3rd law: the dominos hitting each other when the domino falls over which is the action it knocks over the next one which is the reaction
Speed and acceleration
Speed
Problem: Does the mass of the marble affect how fast it goes down the track?
Hypothesis: I think that the biggest marble will go faster, because of the gravity when it gets to the end of one of the tracks when it goes down the to the next one it has a faster speed from gravity pulling. It has a greater pull than the smaller marbles.
Observations: The marble slows as it reaches the end of the track. Also that the marble gains speed going from track to track.
Materials: Tracks made from wood, 3 marbles different sizes, timer, wood blocks, yard stick and a computer for information.
Variables:
Iv: time of the marble
Dv: mass of marble
Cv: The tracks, wood blocks, timer,, yard stick and computer.
Steps:
1. gather all materials
2. Set up tracks
3. Put marble down the track, while timing it
4. then record the results
5. once recorded then do the formula of distance divided by time to get the speed
6. then record the information
7. repeat steps 3-6 2 more times with this marble then 3 more times with the others
8. make table
9. make graph
10. write conclusion
11. clean up
Conclusion: In my hypothesis I thought that the marble with the most mass will go faster down the track. I was wrong, because the larger marble may have had more mass but there it a good and bad thing about that. The good thing is that the marble may have had a faster time at the beginning of the track but since the track was mostly straight it was harder to go faster, because of the gravitational pull is more so that it was going slower. But with the smaller marble it was going faster there is less gravitational pull. It’s like having a obese person against a athlete
External variables: I eliminate external variables by having the same distance between each individual track. So that it’s not a different way for the marble to go every time. Also that the marbles of that mass are the same. I did that since I have a lot of marbles and that they are the same. So what I did is kept them in the same place. So then they would not get messed up. The last one it the tracks, y6ou never know if it has like a crack in it that will disrupt the marble or the tracks are different lengths so that it does not have a farther way to go.
Acceleration
Problem: Does the mass of the marble affect the marbles acceleration?
Hypothesis: I think that the smaller marble will have faster acceleration then the other bigger marbles. Because, the fact that in the speed experiment it went faster and that gravity has not as big of a factor to the smallest marble.
Materials: Tracks, marbles, timer, tape measure, wood, blocks, and a computer
Steps: 1. Gather all materials
2. setup tracks
3. grap three marbles and put each one on the scale and record it
4. take the first marble recorded and put it down the track
5. record the first half of the tracks time and the last half of the tracks time.
6. To calculate the speed do the formula of distance divided by time to get the speed for each one
7. Then do the formula for acceleration final speed- initial speed/ time to get the acceleration
8. Repeat steps 4-7 two more times with that marble and 3 times for the other two
9. Make graph
10. Write conclusion
11. Clean up
IV: the acceleration of the marbles
CV: tracks, timer, distance between tracks, surface of the track.
DV: Mass of the marbles.
Conclusion: My hypothesis was that the smaller marble will go faster, because of less gravity force. I was right it had a better acceleration than the bigger marbles. The reason why was that it had less surface area, so that the bigger marble had to roll over faster than the smaller one, because of the fact that it is smaller. Also that it had less pull from gravity on it so it can go faster than the other marbles on the flat part of the track. Also do to prier experiences when me and my friends played kick ball we used a smaller ball and the bigger ball. When I was pitcher I used both and notice that I had to pitch the bigger faster, because of the fact that it has more surface area.
Graph:
Table:
Eliminating external variables: How I eliminated external variables was by making sure that the tracks were the same length apart and that it was straight and not in different direction. Cause then t could make the marble go slower. Also used the same 2 timers incase if one was like .1 seconds fast, because that matters in this experiment. Another one is that the tracks were the same length and that the marbles are the same, that the marbles are the same weight and the same surface, because if one had a pieces missing or a crack it will not run as good as a regular marble.
