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science unit 3

1.What is often described by a push or pull? A force.
2.What is inertia? The tendency to avoid a motion change.
3.What is an example of sliding friction? Ice skating.
4.What is kinetic energy? Energy in motion
5.What is the unit of energy? Joules
6.What is it called when two equal forces produce no movement? balanced forces
7.What is the first law of motion? Objects at rest shall stay at rest and objects in motion will stay in motion unless acted on by an outside force.
8.What is the second law of motion? An object with more mass is harder to be moved than one with less mass.
9.What is the third law of motion? Every force has an equal and opposite force.
10.What is potential energy? Energy not yet being used.
11.How do two of the same side poles react to each other? They repel
12.How do two opposite poles react to each other? They attract
13.Where is there the most energy on a bar magnet? At the poles
14.How do you make an electromagnet stronger? Adding more wire or using a stronger power source.
15.What advantage does an electromagnet have? They can be turned on and off.
Created by: 02samuel.beckett