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Physics Lower Secondary > Forces I > Flashcards

Forces I Flashcards

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1
Q

force

A

Push or pull that acts on objects

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2
Q

non-contact forces

A

Force that acts without being in contact with something

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3
Q

contact force

A

Force that acts when an object is in contact with a surface, air, or water

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4
Q

electrostatic force

A

The force between two charged objects.

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5
Q

magnetic forces

A

Force between the poles of two magnets, or between a magnet and magnetic material

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6
Q

attract

A

Pull together.

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7
Q

repel

A

To push away

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8
Q

weight

A

Force of a planet on an object due to its mass

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9
Q

friction

A

Force that resists motion because of contact between surfaces

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10
Q

air resistance

A

Force on an object that is moving through air, slowing it down (aka. drag).

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11
Q

water resistance

A

Force on an object that is moving through water, slowing it down (aka. drag).

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12
Q

thrust

A

The force from an engine or rocket.

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13
Q

upthrust

A

Force on an object in a liquid or gas that pushes it up

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14
Q

floating

A

When the upthrust from the water is equal to the force of the object’s weight

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15
Q

tension

A

A stretching force

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16
Q

reaction

A

The force from a solid object that pushes at 90° to the surface

17
Q

normal

A

An imaginary line at right angles to a surface where a light ray strikes it.

18
Q

newton

A

The unit of force including weight, symbol N.

19
Q

newtonmetre

A

Unit of moment, symbol Nm.

20
Q

mass

A

Amount of matter in an object

21
Q

matter

A

Materials and objects which can be solid, liquid, or gas

22
Q

kilograms

A

1000 grams.

23
Q

gravitational field

A

A region in which there is a force on a mass due to its attraction to another mass.

24
Q

gravitational field strength

A

The force on a mass of 1kg (measured in N/kg).

25
Q

streamlining

A

Designing the shape of an object to reduce resistance to motion from air or liquid

26
Q

vacuum

A

A space that has no particles, and so no matter.

27
Q

tangent

A

A straight line that touches a curve or a circle.

28
Q

orbit

A

Path taken by one body in space around another

29
Q

satellite

A

Any body that orbits another (such as moons or weather satellites)

30
Q

newtonmeter/forcemeter/spring balance

A

A meter that is used to measure the magnitude of a force; also called a forcemeter or spring balance

31
Q

gram

A

Unit of mass, symbol g.

Physics Lower Secondary (15 decks)

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