# AQA GCSE Physics 3

Powerpoint Covering AQA GCSE Physics 3

## Slides in this set

### Slide 1

PHYSICS 3

FORCES AND WAVES & MAGNETISM AND

STARS…read more

### Slide 2

FORCES & WAVES…read more

### Slide 3

Turning Forces

A Moment is the Turning Effect of a Force

moment (Nm) = force (N) x perpendicular

distance (m) between line of action and pivot

· the force causes a turning effect or moment, a larger force would cause a larger moment

· making the distance longer, the same force can make a larger moment because the distance

from the pivot is greater…read more

### Slide 4

Centre of Mass

freely suspended pivot

from this point Centre of Mass Hangs Directly Below Point of Suspension

· the centre of mass of an object is the point at which the

whole mass seems to be concentrated

centre of · a freely suspended object will swing until its centre of mass is

mass vertically below the point of suspension

· the objects weight acts at a distance from the pivot which

creates a moment about the pivot, making it swing until the

centre of mass is at its lowest (directly under the pivot)

· it rests in this position as there's no moment, the pivot is in

line with the line of action of the force

weight

weight

pivot

Finding the centre of mass of a flat shape:

1) hang the shape and a plum line from the same point

2) draw along the line on the shape

3) do the same thing again but hang the shape from a centre of

different pivot point mass

4) the centre of mass is where the two lines meet…read more

### Slide 5

Balanced Moments & Stability

For The Seesaw two balance:

total anticlockwise moments = total clockwise moments

Are The Moments Equal?

· if the anticlockwise moments are equal to the clockwise moments, the object won't turn

If They're Not Equal

· if the anticlockwise moments do not equal

the clockwise moments, there will be a

resultant moment so the object will turn

· an object will begin to tip over if its centre of

the mass moves beyond the edge of its base

· if the weight doesn't act in line with the

pivot it'll cause a resultant force, this will:

· put the object up right if the line of

gravity is inside the base

· tip it over if the line of gravity is

outside the base

· the most stable objects have a wide base

and a low centre of mass…read more

### Slide 6

a car making a turn: the force

Centripetal Force of friction on the car's wheels

provide the centripetal force

· in a circular motion the velocity is always changing because

the direction of motion is changing so it has acceleration

even though the speed can be constant · a bucket of water spun in a

· in the circular path there is a force acting toward the centre circle: the tension acting on the

preventing the object from continuing outward and flying off, string provides the centripetal

so the acceleration if towards the centre of the circle force

· the force acting towards the centre of the circle is the

centripetal force

· the centripetal force required will increase when:

· the mass is increased

· the radius is decreased

· the velocity is increased

· the moon orbiting the Earth:

gravity acting on the moon

provides the centripetal force…read more

### Slide 7

### Slide 8

### Slide 9

### Slide 10

## Related discussions on The Student Room

- What would you give your GCSE exams out of 10? »
- What Subject Exams Do You Have Left? »
- AQA Physics GCSE Unit 1 2017 unofficial mark scheme »
- 2017 Unofficial Markscheme List - GCSE and A-Level »
- GCSE AQA Physics 2018 Paper 1 »
- GCSE Results: Post your results! 24th August 2017 »
- Rank your GCSE's from easiest to hardest! »
- AQA GCSE Combined science Physics trilogy 23rd May 2018 ... »
- how are everyone's GCSE exams going?? »
- Nelson Thornes Exam Style Questions Answers »

## Similar Science resources:

# AQA GCSE Physics 3

Powerpoint Covering AQA GCSE Physics 3

- Created by: Bettina Rosaria
- Created on: 23-06-11 19:55

## Slides in this set

### Slide 1

PHYSICS 3

FORCES AND WAVES & MAGNETISM AND

STARS…read more

### Slide 2

FORCES & WAVES…read more

### Slide 3

Turning Forces

A Moment is the Turning Effect of a Force

moment (Nm) = force (N) x perpendicular

distance (m) between line of action and pivot

· the force causes a turning effect or moment, a larger force would cause a larger moment

· making the distance longer, the same force can make a larger moment because the distance

from the pivot is greater…read more

### Slide 4

Centre of Mass

freely suspended pivot

from this point Centre of Mass Hangs Directly Below Point of Suspension

· the centre of mass of an object is the point at which the

whole mass seems to be concentrated

centre of · a freely suspended object will swing until its centre of mass is

mass vertically below the point of suspension

· the objects weight acts at a distance from the pivot which

creates a moment about the pivot, making it swing until the

centre of mass is at its lowest (directly under the pivot)

· it rests in this position as there's no moment, the pivot is in

line with the line of action of the force

weight

weight

pivot

Finding the centre of mass of a flat shape:

1) hang the shape and a plum line from the same point

2) draw along the line on the shape

3) do the same thing again but hang the shape from a centre of

different pivot point mass

4) the centre of mass is where the two lines meet…read more

### Slide 5

Balanced Moments & Stability

For The Seesaw two balance:

total anticlockwise moments = total clockwise moments

Are The Moments Equal?

· if the anticlockwise moments are equal to the clockwise moments, the object won't turn

If They're Not Equal

· if the anticlockwise moments do not equal

the clockwise moments, there will be a

resultant moment so the object will turn

· an object will begin to tip over if its centre of

the mass moves beyond the edge of its base

· if the weight doesn't act in line with the

pivot it'll cause a resultant force, this will:

· put the object up right if the line of

gravity is inside the base

· tip it over if the line of gravity is

outside the base

· the most stable objects have a wide base

and a low centre of mass…read more

### Slide 6

a car making a turn: the force

Centripetal Force of friction on the car's wheels

provide the centripetal force

· in a circular motion the velocity is always changing because

the direction of motion is changing so it has acceleration

even though the speed can be constant · a bucket of water spun in a

· in the circular path there is a force acting toward the centre circle: the tension acting on the

preventing the object from continuing outward and flying off, string provides the centripetal

so the acceleration if towards the centre of the circle force

· the force acting towards the centre of the circle is the

centripetal force

· the centripetal force required will increase when:

· the mass is increased

· the radius is decreased

· the velocity is increased

· the moon orbiting the Earth:

gravity acting on the moon

provides the centripetal force…read more

### Slide 7

### Slide 8

### Slide 9

### Slide 10

## Comments

## Similar Science resources:

## Related discussions on The Student Room

- What would you give your GCSE exams out of 10? »
- What Subject Exams Do You Have Left? »
- AQA Physics GCSE Unit 1 2017 unofficial mark scheme »
- 2017 Unofficial Markscheme List - GCSE and A-Level »
- GCSE AQA Physics 2018 Paper 1 »
- GCSE Results: Post your results! 24th August 2017 »
- Rank your GCSE's from easiest to hardest! »
- AQA GCSE Combined science Physics trilogy 23rd May 2018 ... »
- how are everyone's GCSE exams going?? »
- Nelson Thornes Exam Style Questions Answers »

## Comments

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