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Science > Science- Term 3 (forces) > Flashcards

Science- Term 3 (forces) Flashcards

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1
Q

Force

A

A force is a push, pull or twist when two objects interact

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2
Q

Drag

A

Friction between a moving object and the air it is moving through

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3
Q

Friction

A

Force that acts to oppose the motion between two surfaces as they move over each other

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4
Q

Fulcrum

A

Turning point of a lever

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5
Q

Gravity

A

The force of the attraction that objects have on one another due to their masses

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6
Q

Lever

A

Simple machine that reduces the effort needed to do work

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7
Q

Load

A

Resisting force

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8
Q

Lubrication

A

Using a lubricant, such as oil or grease, to decrease friction

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9
Q

Net force

A

Combination of all forces acting on an object

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10
Q

Newton

A

The unit used to measure force. Named after sir isaac newton

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11
Q

Ramp

A

Simplest type of inclined plane

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12
Q

Spring balance

A

Device consisting of a spring and scale, used to measure forces in the laboratory

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13
Q

Unbalanced forces

A

Two or more forces that are unequal in size and direction and therefore change an objects speed, direction or shape

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14
Q

Work

A

The energy used to move an object over a set distance

Work = force x distance

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15
Q

Types of forces

A

Contact- Non contact-
Friction Gravity
Air resistance Magnetism
Buoyancy Upwards force in water
Normal force

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16
Q

Newtons first law of motion

A

Inertia- when an object is in motion will stay in motion and an object is stationary will stay still unless acted upon

17
Q

Newtons second law of motion

A

Force = mass x acceleration Force = newtons
Mass = KGs
Acceleration = M/S2

18
Q

Newtons third law of motion

A

Opposite and equal reaction to any force

19
Q

First class lever

A

Load/resistance, fulcrum, effort

EG. Seesaw, scissors

20
Q

Second class lever

A

Fulcrum, load/resistance, effort

EG. Nut cracker, wheel barrow

21
Q

Third class lever

A

Fulcrum, effort, load/resistance

EG. Tongs, tweezers

22
Q

Net force

A

If net force is on one side = add

If net force is on opposite sides = subtract

Science (3 decks)

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