Problem: What impact will different ball sizes have on how far a block roles?
Hypothesis: I think that tennis ball will make the block go further since it has more mass and more means the further it should go.
Variables
CV: area,ruler,ramp,block, performer
DV:size of ball
IV:distance block pushed.
Materials
Bouncy ball, golf ball, tennis ball, ramp, block, paper, pencil, and ruler.
Procedure:
1. Gather materials
2. Label the Ping pong ball ball "A"
3. Label the bouncy ball, ball "B"
3. Label the golf ball, ball "C"
4. Have ball A roll down the ramp
5. record data
6. Repeat steps 4 and five two more times
7. Repeat steps 4-6 with ball B and C
8. Compare data
9. clean up
Graph:
Conclusion:
I tested to find the answer of the problem what impact will different ball sizes have on how far a block roles? In my hypothesis I thought that the golf ball would roll the fastest and make the block slide the furthest. I was right since the golf ball had an average of 23 which was longer than all the other balls tested. It did this because since it had a larger mass it had more inertia than any other of the balls.
Some external variables that could have effected the experiment was the way that the ball hit the block. If it didn't hit the black in the dead center of the block it wouldn't of hade as big of an impact than if it would of if it hit in the center. Another was the timing. The times weren't exact since it is nearly impossible to get the right time by the tenth of a second.
This experiment is like some races that I did in boy scouts when I was in first grade.You put your car on a ramp and then there would be a board in front of it. The the boards would release and then the first car to the bottom won.
Friction and Gravity
Problem: What impact does different surfaces have on how far a ping pong ball rolls.
Hypothesis: I think that the smoother the surface will make the ping pong ball go further since if the surface is rougher it will have to overcome the condition which will make it slow down.
Variables
CV: ball, place, tester, ramp height
DV: surface
IV: how far the ball will roll
Materials
Sand paper, ping pong ball, paper, pencil, laptop
Procedure
1. Gather Materials
2. Label the slandered ramp surface A and the ramp with sand paper surface B.
3. place the ping pong ball on the ramp with surface A on it
4. let go of the ball
5. record data
6. do steps 3-5 two more times
7. do steps 3-6 with surface B
8. compare data
9. clean up
Graph:
Conclusion:
I tested to find the answer of what is the impact of the speed of a golf ball when placed on different ramp surfaces. My hypothesis was supported because since with a smoother surface there would be any barriers getting in the balls way.
Some external variables that could have effected my experiment are the timing. It is hard to time it to the exact time, so that could have effected my experiment. Another was the surface of the cardboard. At the end of it there was an indent that could have slowed down the golf ball.
If I was going to do this experiment again I would tried to find different card board and would have another person helping me.
This is experiment is like the cheese roll race in Europe. There is a large, circular piece of cheese that is rolled down a hill. The goal of this is to get the piece of cheese, the only thing is the hill is large and steep. Not only that they roll the cheese when it is wet out. This connects to the experiment since if the hill was dry it would be easier not to fall than when it was wet.
If I did this experiment again I would use a different cardboard ramp. The one that I used had a few indents in it possibly affecting the experiment. Also I would have cut the cardboard since the lengths of the ramps were a bit off.
If I did this experiment again I would use a different cardboard ramp. The one that I used had a few indents in it possibly affecting the experiment. Also I would have cut the cardboard since the lengths of the ramps were a bit off.
Rube Goldberg
First a large ball will role down a ramp and hit a child's toy ( which is called a roller coaster). The roller coaster will hit a string that is on the ground taped. The string is around a pulley. At the end of the string there is a cover of a box that will fall when the roller coaster will hit the string. when it falls it will land on a piece of wood and will make a roll of tape hit a screw witch will make a ball roll around and around and around. Then it will hit a larger ball that will go through a tunnel that will hit dominoes witch will hit a golf ball that will hit a wedge and hit a soccer ball into a goal.
Simple Machines
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Letter
I am writing this letter to you to tell you about how wind energy can be useful to the United States energy needs. The normal way of getting electricity is to get it from a power plant. However power plants use fossil fuels which makes pollution. Pollution is bad for any kind of living ling including animals, plants and even people.
To prevent pollution from damaging any kind of living thing, we must eliminate power plants and use a different source of energy. My solution is wind energy. A great way to use wind energy is to use wind turbines. These are just like old wind mills. The way that they make energy is by making kinetic energy through their blades. They do this by making the flow of wind over the blades creating lift. The blades are connected to a drive shaft that turns and electric generator making electricity.
Wind energy doesn't involve power plants or any use of fossil fuels. Because of this there is no harm to the environment since there is no pollution unlike power plants. For wind turbines to work all they need is sun. Somewhere in the United states is likely to have sunlight somewhere so why not put up a wind turbine there.
From this letter I hope you can see that wind turbines are better for the environment than power plants.
