Force
What is invisible the force that slows things down.
friction
What material do magnets attract? (2 answers)
Iron and steel
What are three types of bridges?
Pillar, Suspension, and Arch
What invisible force pulls you down towards the earth?
Gravity
No! Adding another person does not speed up or slow down the trapeze.
Name 3 items a magnet would attract
Answers may vary (needs to be metal or iron)
(spoon, paper clip, chair, scissors, keys, other magnets)
Which type of bridge is NOT meant to support long distances?
Arch Bridge
What direction is a compass always pulled towards?
North
Why did the final rubber band cause the watermelon to burst?
It created a force that was stronger than the force of the watermelon rind
False! (In fact, we saw an example of magnets doing this)
Which type of bridge works best for a very long, very low bridge (Miss Baxter has been on this kind in the Pontchartrain in Louisiana)
Pillar Bridge
Why can't you use a magnet to pick up a soda can?
The soda can is made out of aluminum not steel or iron
What forces caused your hopper poppers to hop off of the table?
Your fingers PULL the sides out and when you let go the rubber band PUSHED the sides in and up off the table
Are paperclips magnets?
No... they are attracted to magnets
(Yes only when they are MAGNETIZED or touching a magnet)
What type of bridge is the Golden Gate Bridge?
Suspension Bridge
What can cause a trapeze to slow down and eventually stop?
Friction and/or air resistance (the wind) pushing against it
Why is it hard for students to win tug-of-war with students? (Use the word friction in your answer)
Teachers can push with their feet more which means they have more friction to keep them from falling
How can you make a magnet look like it is floating?
Put the opposite ends against each other and they will repel each other (which will make it look like it is floating)
Why are bridges built with arches, or ropes pulling up, or pillars underneath instead of just putting a board from one side to the other?
A plain board has no support, so it will probably snap or break.
Would you make the rope shorter or longer to make the speed of a trapeze slower?
Longer (We tested this in class)