Speed and Acceleration

P: how does the ramp height affect the speed and acceleration of the car.

H: I think that the car will gain more speed the higher the ramp.

Materials

Car

Ramp

Dominos

Timer

ruler

Variables

IV: Ramp height

DV: Acceleration

CV: car ramp, dominos, timer, person, place,

E: gather all materials

Make ramp with 2 Dominos

Put car on track

Use timer to find the time to get were it stops

Use ruler to find distance

Repeat steps two through four 3 more times

Make ramp with 3 Dominos

Put car on track

Use timer to find the time to get were it stops

Use ruler to find distance

Repeat steps two through four 3 more times

Make ramp with 4 Dominos

Put car on track

Use timer to find the time to get were it stops

Use ruler to find distance

Repeat steps two through four 3 more times

O: in Excel

C: My H was Supported by my Observation. The car gains speed as it goes down the ramp and it accelerates more. The ramp height has a big affect on the car and it's speed.

      The ramp has an affect on the rate the car travels at when going down the ramp. When the toy car goes down the ramp with 2 Dominos it takes a longer time to move to the end and then off the ramp. The car would maybe get 1/4 of an in. off the end of the ramp then stop. The time was 3.1 seconds for it to get off the ramp the first time, then 2.8,3.3,2.6. The ramp that was 3 dominos high was easier to test because it let the car gain speed faster. The first test of the car was a failure because the ramp fell over and would not stay still while the car went down it. Then I fixed it so the dominos could not move and it worked. The next test was better and I got a distance of around 1/4 again. The time was 2.6,2.9,3.2,3.5 so the better than before but had some times that were worst. The third test was the hardest because the car went far enough that it would hit a slope in the table, I didn't find out un till I went over the distance and found the table was not completely level. So I traded to another table to do my test and it worked out fine. The distance was 3/4-1 in. and the time was 2.5,2.7,3.5,2.1 s this was the fastest of them all.

        In the end I got the rate of the car in the first test as being about 0.1 in/s. The second test was also about 0.1 in/s and the last test was about 0.36 in/s. I took the fastest speed from all of the test. The ramp had a different affect on all the tests depending on it's height.

Solar Energy

             There are many kinds of energy that the USA could use for power other than fossil fuels. One of these types of energy is Solar energy. Solar energy is one of the cleanest types to use and can power many things at once.

      Solar energy can be used to power a whole house at one time with only a few hours of sun light. If you live in a place that has lots of sun light like Arizona than solar energy is for you. The energy that is produced by solar energy can be just as powerful as fossil fuels. Solar energy is one of the most underused energy types. Most people think that Solar energy is a bad idea for them to use because it might not get enough sun light in the winter time to power their house. The people who use solar energy use it during the summer the most and in the winter they can still use It but not as much.

       All in all one of the most abundant resources on earth is sun light. Why let it go to waste if we can use it for power that is clean and powerful.

Gravity and friction

P: How does the ramp height affect how gravity is applied to the car.

H: I think that the higher the ramp is the more car will be affected by gravity. Because the force will increase the speed.

Materials:
Toy car
Track for car
4 Dominos
ruler

E: gather all materials
Build ramp 2 Dominos high, by putting them flat on top of each other.
Put car on ramp
Measure distance the car goes off the ramp in Inches.
Build ramp 3 Dominos high, by putting them flat on top of each other.
Put car on ramp
Measure distance the car goes off the ramp in Inches.
Build ramp 4 Dominos high, by putting them flat on top of each other.
Put car on ramp
Measure distance the car goes off the ramp in Inches.

Variables:
IV: ramp height
CV: the car, dominos, the ruler, the place
DV: distance traveled

O: in Excel

C: My H was supported by my observation. The higher the ramp height the more the car is affected by gravity and friction.
The ramp height in my experiment is the thing that made the difference. Gravity has a bigger affect on things that are higher up because they have more time being affected by it. Like if I drop an apple off a table it will be less affected that if I dropped it off the top of a building. From the first test I got that the car went 1/2 in. off the end of the ramp. From the second test I got that the car went about 1 in. off the end of the ramp. When I tested the ramp the third time I got the car to go 1 1/4 in. of the end of the ramp. When I tested the last time I got the car to go 1 3/4 in. off the end of the ramp.
The ramp height didn't affected the experiment very much for friction. The higher the ramp the same amount of friction. Even thought I had thought that it would I was wrong. The amount of friction was the same no matter how high the ramp was.
All in all my experiment was helpful to find how the laws affect a toy car that goes down a ramp. If the ramp was higher than the car might have gone farther.