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science yr 8 > science revision forces > Flashcards

science revision forces Flashcards

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1
Q

what is friction?

A

a force which slows objects down.

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2
Q

what happens if the friction is greater?

A

it will slow the object down faster

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3
Q

what will happen if the force is stronger than the friction force?

A

the object would be harder to slow down you have to increase the friction force.

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4
Q

what is the force called when an object is moving through a liquid and slows it down?

A

drag

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5
Q

what are drag and friction forces?

A

contact forces.

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6
Q

what are drag and friction forces measured in?

A

newtons (N)

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7
Q

what is it called when a spring stretched?

A

extension.

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7
Q

what is it called when a spring stretched?

A

extension.

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8
Q

what is it called when a spring stretches past its lymit?

A

elastic limit.

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9
Q

if the object obeys Hooke’s law what relationship will it have?

A

linear relationship.

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10
Q

what is a moment measured in?

A

Newtons (N)

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11
Q

what is the pivot?

A

the middle of the object

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12
Q

what is it called when the object is balanced?

A

equilibrium.

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13
Q

what is gas pressure caused by?

A

gas particles colliding with the walls of the container it’s in.

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14
Q

what happens if the gas particles collide with the walls of the container more?

A

the pressure gets higher.

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15
Q

what happens if you increase the temperature of the gas?

A

the pressure will be increased and the particles move faster.

16
Q

what is atmospheric pressure?

A

is the pressure which air exerts on you all the time near the ground there is more particles weighing you down. the pressure will be greater.

17
Q

the higher you go what happens?

A

the atmospheric pressure is smaller so you don’t get weighed down as much.

18
Q

what is the pressure called in a solid?

A

stress

19
Q

what happens if the area is where the gas is going over is greater?

A

the pressure is lower.

20
Q

what is the equation of pressure?

A

pressure= force -/- area

21
Q

why does the deeper the ocean gets the pressure increases?

A

because the pressure depends on the weight of the water above.

22
Q

what happens if there is more water molecules above?

A

the pressure will be higher.

science yr 8 (7 decks)

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