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Gcse Physics > P8 Forces > Flashcards

P8 Forces Flashcards

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1
Q

What is inertia

A

When an object resist changes in its state of motion

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2
Q

What is a scaler

A

Physical quantities that have size/magnitude but no direction

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3
Q

What is a vector

A

Physical quantities that have size/magnitude and direction

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4
Q

What are contact forces

A

Two object must interact to create a contact force

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5
Q

What are non-contact forces

A

They dont need to directly touch to interact to ceate a force

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6
Q

What are some non contact forces

A

Magnetic force, electrostatic force, gravitational force

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7
Q

What are contact forces

A

Friction, air resistance , stretching

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8
Q

What are some scalar quantities

A

Temperature, mass, speed, time and volume

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9
Q

What are some vector quantities

A

Resultant Force, acceleration, displacement, momentum, velocity

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10
Q

What is newtons first law

A

Inertia, an object remains in the same state of motion unless a resultant force acts on it

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11
Q

What is resultant force

A

The single force that replaces all the forces acting on an object by adding them together

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12
Q

What is newtons 2nd law

A

Resultant force = mass x acceleration

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13
Q

What is newtons 3rd law

A

When 2 object interact , they exert an equal and opposite reaction

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14
Q

What is displacement

A

A distance an object moves , measured in a straight line from start to end point

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15
Q

What 3 things can a force do

A

Make an object change shape, motion and state of rest

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16
Q

Speed is

A

Distance / time

17
Q

Force is

A

Mass X acceleration

18
Q

Velocity is

A

Displacement / time

19
Q

If forces are balanced on a stationary object

A

The object remains stationary

20
Q

If forces are balanced on an object already in motion

A

The object stays at a constant velocity

21
Q

If forces are unbalanced on a stationary or non stationary object

A

That will result in acceleration or deceleration

22
Q

What is moments

A

A moment is the turning effect of a force

23
Q

What is a pivot

A

Where something rotates around

24
Q

How do you calculate moments

A

Force X distance

25
Q

What are pulleys and gears

A

Simple machines to transmit rotational forces also to increase or decrease rotational force

26
Q

How do you calculate moment by using gears

A

Moment = force X gear radius

27
Q

What happens when you use gear 1 on a bike

A

There is a high turning effect and a low speed

28
Q

What happens when you use gear 6 on a bike

A

There is a low turning effect and high speed

29
Q

What is a gear

A

A gear is used to transfer motion from one place to another

30
Q

What is a lever

A

A lever is a wooden or metal rod which it used to move an object

Gcse Physics (1 decks)

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