Push and Pull
Why is it hard to win a tug-of-war against a group of teachers?
a. Teachers try really hard.
b. Teachers have more legs than students.
c. Teachers have a lot of friction.
d. Teachers can push really hard.
d. Teachers can push really hard.
Sandpaper sliders don’t slide very fast because ___________.
a. sand makes the slider too heavy.
b. sandpaper creates a lot of friction.
c. it didn’t have enough pennies on it.
d. the slide isn’t long enough.
b. sandpaper creates a lot of friction.
Magnets attract _____________.
a. objects that contain iron.
b. only other magnets.
c. anything made of metal.
d. things that are not too heavy.
a. objects that contain iron.
What supports a pillar bridge?
pillars
What is a force that moves away from you?
push
The last rubber band caused the watermelon to burst because _________.
a. it was stronger than the other rubber bands.
b. it was thicker than the other rubber bands.
c. it was the last rubber band in the bag.
d. it created a force that was greater than the force of the watermelon rind.
d. it created a force that was greater than the force of the watermelon rind.
If you wanted to go down a slide faster, what are some things you could do? Why would those things help?
Create a slide out of something with less friction. Wear something that has less friction.
What does it mean to repel?
to move away
Why are pillar bridges and arch bridges stronger than board bridges?
Pillars and Arch bridges support the bridge underneath.
What is a force that moves toward you?
pull
Why does a water balloon pop when you step on it but a watermelon doesn’t pop when you step on it?
The force of your foot is stronger than the force being put off by the water balloon, but it is not stronger than the watermelon.
Imagine a student sliding down a slide. If the friction force is stronger than the force of gravity, what will happen?
The student will not slide down the slide.
What does it mean to attract?
Attract means to pull together.
What type of bridge is supported by towers and cables?
a. arch
b. suspension
c. pillar
suspension
Will coins stick to a magnet?
No
When you press, throw, or stomp is that a pushing force or a pulling force?
Pushing
What is the downward force that makes objects fall to the ground?
Gravity
Out of pop cans, pennies, dimes, and paperclips, which will stick to a magnet?
paperclips
Why are truss bridges stronger than board bridges?
They have more support with the triangle shaped sides.
Which of these objects has the least friction? Most friction?
sandpaper, steel, glass, foam, wood
Most- sandpaper
least- steel
What is it called when two objects rub together?
Friction
What is the largest magnet?
The Earth