any interaction that, when unopposed, will change the motion of an object.
1 of 15
Name a force
Gravitational
2 of 15
what direction do different forces act in
opposing directions
3 of 15
how can forces be balanced
when the opposing forces are equal
4 of 15
how can forces be unbalanced
when the opposing forces are not equal
5 of 15
what is hookes law state?
that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
6 of 15
how is friction useful
when walking over slippery surfaces
7 of 15
how is friction not useful
when walking over rough surfaces
8 of 15
how can you reduce friction
use slipery fluids
9 of 15
what materials are magnetic
iron, steel, nickle
10 of 15
why do magnets repel or attract other magnets
because the north end attracts the south, but reppels the north of other magnets and visa versa
11 of 15
how do you make an electromagnet
***** ends of a wire, wrap the wire around a nail, connect the exposed ends of the wire to a battery, ues the magnet
12 of 15
use of electromagnets
carrying heavy loads
13 of 15
Describe how changing the core can affect the strength of an electromagnet
it strengthens the level of magnitism
14 of 15
how does an eletric bell work
When an electric current flows through the coils, the rods become magnetic and attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring.
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