Temporary Magnets

If you take a magnet and brush a nail or anything made of iron or steel with the pole of the magnet in one direction, it will become a magnet. Why? Because all things are made of molecules and the molecules in a magnet are facing in the same direction working with each other. When you rub or brush the nail you are making the molecules go in one direction. Then, they will be a magnet, until the molecules go their normal direction.

Magnets

Magnets have a north part and a south part called poles. Magnets are strongest at their poles. If you put North and North together they will repell. Same with South and South. I did an experiment with 3 different magnets. I used a ring magnet, a bar magnet, and a u-shaped magnet. I wanted to see which magnet was stronger. I took the magnet and I saw how many paperclips each magnet could hold. The u-shaped magnet was stronger.

Inclined Planes, Wedges, Screws

My Experiment:

Question:
What takes more Force? Lifting the car or rolling it up an inclined plane?

Hypothesis:
I think lifting the car takes more force.

Supplies:
truck
cutting board
pulley

Procedure:
First I took the pulley and hooked it up to the bumper of the car and I lifted the car up. It took 3.2 Newtons of Force to move it 15 inches. Then I put the car on the incline plane and rolled it up and that was 1.4 Newtons to move it 41 inches.

Conclusion:
I was right.


Work = Force x Distance




Simple machines make work easier because you don't have to use as much force, the distance does the work for you.