Proficiency #1
Problem
How does the mass of a toy car affect the distance a piece of wood moves?
Hypotheses
I think the heavier the car the further the piece of wood will go.
Materials
1.3 Toy cars with different masses
2.2 by 4 piece of wood
3. Toy car track
4. Scale
6. Ruler
Procedure
1. Gather all materials
2. Set up the track
3. Put wood in front of track
4. Put ruler parallel with the wood and track
5. Put each different massed car down.
6. Repeat step and 5 five times
7. Write observations
8. Conclusion
9. Clean up
Variables
CV-Track, spot put on track
IV- The car hitting the wood
DV-The mass of each car, different masses
EV- How old the toy car is
Conclusion
In conclusion the different masses of cars had an impact on the distance that the wood travels. The car that moved the fastest moved the wood the furthest. The car with the less weight barely even moved it
Trial 1 | Trial 2 | Trial 3 | |
Weight of car(ounces) | 23.1 | 73.3 | 123.6 |
Distance Block was moved (inches) | 1 1/4 | 4 | 6 1/4 |
Proficiency#2
Problem
What impact does the surface of the track have on the time it takes to reach the bottom?
Hypotheses
The rougher the surface the faster the time it would take to get to the bottom.
Materials
1. Toy car
2. Sand paper
3. Toy car track
4. Water
5. Stop watch
6. Tape
Procedure
1. Gather all materials
2. Set up three tracks.
3. First track with tape on it
5. Second track with water on it.
6. Third track with sand paper on it
7. Conclusion
8.Clean up
Variables
CV-Track, spot put on track
IV- The car hitting the wood
DV-The mass of each car, different masses
EV- How old the toy car is
Conclusion
In conclusion the different surfaces of the track differed the time the car makes it to the bottom. The sand paper surface made the car move slower, and the regular track, the car had a smoother ride. In my hypothesis I was correct the rougher the surface the slower the car will go.
Trial 1 | Trial 2 | Trial 3 | |
Wood Surface | 0.48 | 0.34 | 0.35 |
Sand paper | 0.43 | 0.46 | 0.4 |
Proficiency#3
Problem
Does the mass of a toy car affect the rate of deceleration
Hypotheses
I think The heavier the car the more deceleration because there is more friction
Materials
1. Toy car
2. Scale
3. Toy car track
4. Stop watch
Procedure
1. Gather all materials
2. Set up track
3. Put each different massed car down
6 Time how long car takes to get down track
7. Conclusion
8.Clean up
Variables
CV-Track, spot put on track
IV- The car going down track
DV-The mass of each car, different masses
EV- How old the toy car is
Conclusion
In conclusion the less mass the car had, the less friction that was between wheels and tracks, there for the car will have faster acceleration. The car that weighed the most took longer to get down the track.
Trial 1 | Trial 2 | Trial 3 | |
Car 1 | 0.57 | 0.62 | 0.64 |
Car 2 | 1.01 | 0.92 | 0.92 |
Car 3 | 0.68 | 0.71 | 0.68 |
Hydropower
Hydropower is electricity generated using the energy of moving water. Rain or melting snow, usually coming from the hills and mountains, create streams and rivers that eventually run to the ocean and lakes. The energy of that moving water can be fast, as anyone who has been whitewater rafting knows.
This energy has been used for centuries. Ancient Greeks have used water wheels to grind wheat into flour. These water wheels are placed in a river; it picks up flowing water in buckets located around the wheel. The kinetic energy of the flowing river turns the wheel and is converted into mechanical energy that runs the mill.
In the late 19th century, hydropower became a source for generating electricity. The first hydroelectric power plant was built at Niagara Falls in 1879. In 1881, street lamps in the city of Niagara Falls were powered by hydropower. In 1882 the world’s first hydroelectric power plant began operating in the United States in Appleton, Wisconsin.
The biggest hydro plant in the United States is located at the Grand Coulee Dam on the Columbia River in northern Washington. More than 70 percent of the electricity made in Washington State is produced by hydroelectric facilities.
Hydropower is the cheapest way to generate electricity today. That's because once a dam has been built and the equipment installed, the energy source is flowing water it is free. It's a clean fuel source that is renewable yearly by snow and rainfall.
Rube Goldburg
Rube Goldburg
1. First I would have an inclined plane that a marble will roll down, this is mechanical energy.
2. Then I would have it roll down into a screw, also mechanical energy.
3. Then I would have a number of inclined planes that are in a zig zag shape, also mechanical energy.
4. Then I would have it go into a lever that would make the other end of the lever pop up and hit a row of dominoes, this is kinetic and potential energy.
5. Then I would have the dominoes fall onto a hammer which would be a lever and the hammer would swing down and break a walnut, potential and kinetic energy.
