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kennedy and lilly are in science class. they are asked to prove that some forces are non-contact forces. the girls list five examples of objects exerting a force on each other without touching. do you agree with their list? tell why or why not?
1) two like magnetic poles repel each other.
2)putting on a wool sweater can make your hair get static electricity when it rubs against the sweater.
3) when you bring two negatively charged balloons near each other they push each other away.
4) magnets stick to a refrigerator.
5) a motor uses magnets to transform mechanical energy into electrical energy.
a)number 1 and 4 are non-contact forces since they both use magnets.
b)number 1, 3 and 5 all demonstrate non-contact forces because the magnets or electrically charged objects exert forces on each other without touching.
c)all five are good examples of non-contact forces since they all use either magnets or electric charge which are non-contact forces.
d)number 1 and 3 are both good examples to prove non-contact forces since the magnets and balloons are not touching.
Answers: 2
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A. s.a. p.! will be marked to be as ! 30 !
kennedy and lilly are in science class. th...
kennedy and lilly are in science class. th...
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