Push or Pull
PRESS is a.... push or pull?
Push
When sand paper slides down a slide does it cause...
high friction or low friction?
High Friction
Which of the items will a magnet attract....
Paperclip
Popsicle stick
Penny
Paperclip
Why is a board bridge the least sturdy bridge of all?
There is nothing pushing or pulling it, so the board sags with too much weight.
Which slidder was faster?
Styrofoam or Cardboard?
Cardboard
THROW is a.... push or pull?
Push
Name a material what would cause HIGH friction going down a slide.
Answers will vary...
Sandpaper
Wood
What materials do magnets attract?
Iron and Steel
Explain how a pillar bridge has pushes or pulls.
The pillars of the bridge pushes the bridge up.
Imagine a student sliding down a slide. If the friction force is stronger than the force of gravity, what will happen?
The student will stop sliding.
STOMP is a.... push or pull?
Push
How could you change friction to slide down a slide faster?
You could make the slide more slippery, you could wear slippery clothes, or you could ride on a slippery material. All of those things would make less friction force, so the pull of gravity would bring you down the slide faster.
Name 3 items that magnets DO NOT attract.
Paper
Wood
Copper
Explain how an arch bridge has pushes or pulls.
The arch under the bridge pushes the bridge up.
Why is it hard for students to win a tug-o-war contest against a group of teachers?
Teachers can cause a lot of friction because of their strength and size.
DRAG is a.... push or pull?
PULL
Why does a slidder with 5 pennies slide faster than a slidder with 1 penny?
The slidder with 5 pennies has more weight than the slidder with 1 penny.
The more weight, the more pull gravity has over the item which pulls the slidder down faster.
Explain how magnets can repel and attract.
Magnets have two ends. A positive and a negative end. When they are opposite, they attract. When they are the same, they repel.
Explain how a suspension bridge pushes or pulls.
The suspension cables pull the bridge up.
Name the four forces of motion we learned about in our unit.
Push
Pull
Attract
Repel
Name two examples of a push and two examples of a pull
Answers will vary
How does high friction and low friction affect gravity?
When something has high friction, gravity has a harder time pulling on the item.
When something has low friction, gravity can pull on the item easily.
Are Paper Clips Magnets? Explain
Paper clips are not magnets, but they can become magnetized by coming in contact with magnets.
The paper clips that are touching magnets can pick up things made of iron.
It will stay magnetized for a short time after the magnet is removed.
Why was a suspension bridge the only option for the Golden Gate Bridge in San Francisco? .Explain why the other bridges wouldn't work.
Board bridge- no support, and too far of a gap
Pillar bridge- boats wouldn't be able to pass underneath and water is too deep
Arch bridge- too big of a gap
Suspension was the best option because of the deep waters, the boats that need to pass underneath, and the large gap between the two towns.
In the watermelon experiment, why did the last rubber band cause the watermelon to burst?
Before the last rubber band, the force of the rubber bands were equal to or less than the force of the rind pushing back. The last rubber band was special because adding it made the force of the rubber bands stronger than the force of the rind.