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Physics (Year 7) > Physics KS3 Forces (in order) > Flashcards

Physics KS3 Forces (in order) Flashcards

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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.)

A

Friction

18
Q

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

A

Gravity

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?

A

Mass

23
Q

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

A

Weight

24
Q

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

A

Weight

25
Q

If you’re talking about something that changes from planet to planet, are you talking about Mass or Weight?

A

Weight

26
Q

If you’re talking about the kg, are you talking about Mass or Weight?

A

Mass

27
Q

If you’re talking about the Newton/N, are you talking about Mass or Weight?

A

Weight

28
Q

If you’re talking about something that doesn’t change from planet to planet, are you talking about Mass or Weight?

A

Mass

29
Q

Remember that Weight = Mass x Gravitational Field Strength. If Mass = 1kg and Gravitational Field Strength = 10 N/kg, what is Weight?

A

Weight= 1 x 10 = 10 N

30
Q

Remember that Weight = Mass x Gravitational Field Strength. If Mass = 0.1kg (100g) and Gravitational Field Strength = 10 N/kg, what is Weight?

A

Weight= 0.1 x 10 = 1 N

31
Q

Remember that Weight = Mass x Gravitational Field Strength. If Mass = 0.2kg (200g) and Gravitational Field Strength = 10 N/kg, what is Weight?

A

Weight= 0.2 x 10 = 2 N

32
Q

Remember that Weight = Mass x Gravitational Field Strength. If Mass = 2kg and Gravitational Field Strength = 2 N/kg, what is Weight?

A

Weight= 2 x 2 = 4 N

Physics (Year 7) (7 decks)

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