Physics KS3 Forces (in order) Flashcards

1
Q

What is a force?

A

A force is a push or pull that acts on an object

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2
Q

Forces are measured in ……. (units)

A

Newtons or N / (N must be uppercase)

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3
Q

To measure a force the instrument you use is a …….

A

newtonmeter or forcemeter or spring balance

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4
Q

Sometimes the two bodies must be touching for the force to be present these are called ……. forces.

A

Contact

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5
Q

Sometimes one body can have an effect on another without having to be in contact, these forces are known as ……. forces.

A

Non-contact

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6
Q

Description: Forward push of an object moving on a solid surface – Name the force and state whether contact or non-contact

A

Thrust/Forward force / Contact

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7
Q

Description: Attraction (pull towards) or repulsion (push away) of magnets and magnetic materials – Name the force and state whether contact or non-contact

A

Magnetism/Magnetic / Non-contact

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8
Q

Description: Attraction between two objects with mass (Gravity) – Name the force and state whether contact or non-contact

A

Weight / Non-contact

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9
Q

Description: Upward push of water on an object – Name the force and state whether contact or non-contact

A

Upthrust / Contact

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10
Q

Description: Upward push of a solid surface on an object – Name the force and state whether contact or non-contact

A

Normal contact / Contact

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11
Q

Description: Force which slows objects moving along a solid surface – Name the force and state whether contact or non-contact

A

Friction / Contact

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12
Q

Description: Force which slows objects moving through water – Name the force and state whether contact or non-contact

A

Water resistance/drag / Contact

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13
Q

Description: Force which slows objects moving through air – Name the force and state whether contact or non-contact

A

Air resistance/drag / Contact

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14
Q

Description: The force pushing up on an object as it moves through the air, caused by differences in air pressure. – Name the force and state whether contact or non-contact

A

Lift / Contact

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15
Q

Description: Forces caused when objects eg springs, string are stretched/compressed – Name the force and state whether contact or non-contact

A

Tension/Compression / Contact

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16
Q

Which force is represented by the arrows around the third car?

A

Air resistance

17
Q

Which force is represented by the red arrow? (The hand is pushing the mug forwards.)

18
Q

Which force are the elephant and the lorry exerting on each other?

19
Q

Which force is represented here?

A

Water resistance

20
Q

How can friction between solid objects be reduced?

A

Lubrication eg oil on bike chains or wax on snowboards

21
Q

How can drag forces such as water resistance or air resistance be reduced?

A

Streamlining/use streamlined shapes

22
Q

If you’re talking about how much of a substance there is, are you talking about Mass or Weight?

23
Q

If you’re talking about a force, are you talking about Mass or Weight?

24
Q

If you’re talking about something measured in Newtons, are you talking about Mass or Weight?

25
If you're talking about something that changes from planet to planet, are you talking about Mass or Weight?
Weight
26
If you're talking about the kg, are you talking about Mass or Weight?
Mass
27
If you're talking about the Newton/N, are you talking about Mass or Weight?
Weight
28
If you're talking about something that doesn't change from planet to planet, are you talking about Mass or Weight?
Mass
29
Remember that Weight = Mass x Gravitational Field Strength. If Mass = 1kg and Gravitational Field Strength = 10 N/kg, what is Weight?
Weight= 1 x 10 = 10 N
30
Remember that Weight = Mass x Gravitational Field Strength. If Mass = 0.1kg (100g) and Gravitational Field Strength = 10 N/kg, what is Weight?
Weight= 0.1 x 10 = 1 N
31
Remember that Weight = Mass x Gravitational Field Strength. If Mass = 0.2kg (200g) and Gravitational Field Strength = 10 N/kg, what is Weight?
Weight= 0.2 x 10 = 2 N
32
Remember that Weight = Mass x Gravitational Field Strength. If Mass = 2kg and Gravitational Field Strength = 2 N/kg, what is Weight?
Weight= 2 x 2 = 4 N