Mystery Science: Forces and Motion Final

Mystery Science: Forces and Motion Final

By Ms. Rodriguez

When we play a game of "Tug-of War", we are using our arms to pull the rope to us. Pulling is a force.

How can win at a game of "Tug-of'War"?​

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What part of our body will help us win?

How could you win at tug of war?​

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Our feet push to the ground in order to give a stronger pull on the rope.

These are called forces. ​

Remember the watermelon challenge? ​

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What happened to the watermelon in the video?

Tug of War Champions

Multiple Choice

What caused the last rubber band place don the watermelon to make it burst?

• The magnet made it burst

• That rubber band was the strongest rubber band ever!

• The force created by the rubber bands was greater than the watermelon itself

• The rubber band had spikes on it

Multiple Choice

Pressing a button shows the force of:

• Push

• Pull

• Magentism

Multiple Choice

Stomping on the floor shows the force:

• Push

• Pull

• Magentism

Multiple Choice

Yanking on a rope shows the force:

• Push

• Pull

• Magentism

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​Many materials help a bridge stay strong from it sagging. Cars and people gong across the bridge causes push down on the bridge.

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​​What makes a bridge so strong?

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​To help bridges, designers have added materials or designed the bridge to push up on the bridge, so it won't sag. Some of these materials are pillars. One type of design in an arch bridge. These bridges push off to the sides, causing the middle of the bridge to not sag. Do you remember the other designs?

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Support

Multiple Choice

Why was the suspension bridge built in San Francisco a good idea?

• It needed pillars

• The distance the bridge had to be wasn't long

• Ships had to pass underneath the bridge

• There was no water underneath

It's all about friction and gravity! Gravity will pull you down faster, depending on how much friction there is between you and the slide, as well as how steep or slanted the slide is.

​if a slide is slick and smooth, you will go faster down it then a slide that is bumpy and rough.

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What materials are better to use to go down a slide?

How can you go faster down a slide?

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A pushing force between materials rubbing together.​

Gravity and the slide are causing friction. Gravity wants you down (push), but the speed you go at depends on the slide (pushes against gravity). ​

Least friction= better/faster slide

More friction= ​not so good/slower slide

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What is friction?

Multiple Choice

Which material had the least friction (faster go down the slide)?

• Bottle cap

• Sand paper

• Foam

Multiple Choice

Which material had the most friction (slid down last)?

• bottle cap

• sand paper

• button

Magnets can pull on things without touching them directly.

Things made of iron are immediately pulled by the force of a magnet.

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Remember the silly putty with iron flakes mixed into it?

What can magnets do?

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Multiple Choice

How can a paper clip turn into a magnet?

• By becoming magnetized when touching an actual magnet

• By asking to be a magnet

• This cannot happen

• By sticking to your refrigerator

Multiple Choice

Where do you think Ms. Rodriguez is right now?

• In another classroom

• At home

• With her son Jaxson

• At the beach