Forces and Magnets Sporty Forces Think about the
Forces and Magnets
Sporty Forces
Think about the forces involved. . . Let’s look at how the forces are at work in football • The player kicks the ball (Push) • The ball flies into the air and then falls back down to the ground because of gravity (pull) • The player’s studs push into the ground as she / he runs and the mud changes shape to make a footprint (push) • The player catches the ball for a throw in (pull) • The player takes a throw in (push)
Clues to help you Remember forces (pushes and pulls) can: • • • Start something moving The something could be: Stop something moving • A person Speed something up • An object (e. g. ball, Slow something down racquet, stick, boat, Change the direction of something bike) Change the shape of something • A surface or substance (e. g. water, air, sand, grass, mud)
What are we learning today? I can recognise that some forces need contact between two objects, but magnetic forces can act at a distance. I can set up a simple practical enquiry and a fair test.
What kind of magnets do we see in real life? Magnetic Puzzles Magnets to decorate fridges
Magnetic clips hold messages Magnetic travel games keep the pieces in place when you are on the move
Magnetic catches can help keep cupboard doors closed
Magnetic Badges can be easier and safer to fasten than pin badges Magnetic jewellery is fun to wear as you can change the design whenever you want
A pair of strong magnets can help you clean the inside of a fish tank without having to get your hands wet! The magnet on the inside has a rough cloth attached to it. You rub the magnet on the outside to clean the glass on the inside.
Magnetic construction toys are fun and easy to use Magnetic boards can help with learning
What would you like to find out about magnets?
Here are some questions you could have thought of s Which magnet i t e n g s a n m a g h i t b l t he strongest? u e f r r A e w o p e r o m ? s e f o n s t e o e h l s l y n a m w sma o Are ma H e g d i r gnets j f a ust as paper can power ful und ? d l o h t e n erwate mag as they r are thr ough the air You may have thought of ? some different ones of your own
Can you think of a way to test how powerful a magnet is? Would your test be fair? Here a couple of ways you could test it Discuss your ideas Count how many paper clips the magnet can hold Measure how far away the magnet can be to pull an object towards it
Scientists try to answer their questions by doing an investigation (setting up a test) Are big magnets more powerful than small ones? Which magnet is the strongest? How many sheets of Are magnets just as powerful underwater paper can a fridge as they are through the magnet hold? air? You could choose a magnet question of your own Which question would you choose to investigate? How would you set up a fair test?
Let’s Investigate! Find some magnets in your house and some paper clips if you have them. Investigate which magnet is the strongest by seeing how many paper clips each magnet can attract. Remember, we are learning about how a magnet can act at a distance, so do not touch the paper clip with the magnet, hold it above and then count how many paper clips it is able to hold.
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