# gcse-aqa-physics-paper-2

## Turning Moments

The size of the turning effect is called a turning moment. As Newton’s first law of motion states, an object will remain at rest if the forces are balanced. When the sum of the forces add to zero, a body will remain at rest or move at a constant velocity.

## Demo

In this tutorial you will learn how to calculate the moments and apply the results to a real life situation for example forces acting on a see-saw.

The equation for this calculation is written like this:

$M = { \text F \; \text x \; \text D}$

## Chilled practice question

The anticlockwise moment is is 75 Nm. What distance from the pivot must you place a 2.5 Kg mass for the clockwise and anticlockwise moments to equal ? Take gravity as 10N\Kg

## Frozen practice question

You sit 2 m away from the pivot on a see-saw and your weight is 500 N. Your friend has a mass of 25 Kg. How far away from the pivot on the other side should they sit for the see-saw to balance ? Take gravity as 10N/Kg

## Science in context

The size of the turning effect is called a turning moment.
Turning moment = force x perpendicular distance from the pivot.
As Newton’s first law of motion states, an object will remain at rest if the forces are balanced.
When the sum of the forces add to zero, a body will remain at rest or move at a constant velocity.

## Millie’s Master Methods

### Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …

### Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …

## The Fridge Physics Store

### Teacher Fast Feedback

Feedback to students in seconds – Voice to label thermal bluetooth technology Click …

### Get Fridge Physics Merch

Why not buy a Fridge Physics baseball cap, woollen beanie, hoodie or polo shirt, all colours and sizes available. Free delivery to anywhere in the UK! Fridge …

## GCSE AQA Physics P2

### Pressure in a Gas

Gas Pressure is created when gas particles collide with the walls of their container. The more often the particles collide with the walls, and the faster …

### Wave Speed

Wave speed is given in meters per second (the number of waves that pass per second). Wavelength is measured in meters and frequency is measured …

### Turning Moments

The size of the turning effect is called a turning moment. As Newton’s first law of motion states, an object will remain at rest …

### Moments

Forces can cause an object to rotate and the turning effect of the force is called a moment. If a resultant force acts on an object about a …

### Force on a Spring

When a force acts on a spring it is stretched or compressed, its length will changes by an amount e from its original length. …

### Pressure

Pressure can be calculated if you know the force applied to or by an object and the contact area. The units are newtons per square …

### Force, Mass and Acceleration

An object of constant mass accelerates in proportion to the force applied. Demo In this tutorial you will learn how to calculate the force applied to an object if you …

### Forces and Work Done

The unit for work done is the joule (J), or Newton meter (N-m). One joule is equal to the amount of work that is done when 1 N of force moves an …

### Momentum

All moving objects have momentum. Forces can cause changes in momentum. The total momentum in a collision or explosion is conserved and stays the …

### Change in Momentum

All moving objects have momentum. Forces can cause changes in momentum. The total momentum in a collision or explosion is conserved and stays the …

### Wave Period

The period of a wave is the time it takes to complete one cycle. The unit for a wave period is seconds, and it is inversely proportional …

### Transformers

A transformer is an piece of electrical apparatus which will increase or decrease the voltage in an alternating current. It can be designed to “step up” …

### The Motor Effect

A current-carrying wire or coil can exert a force on a permanent magnet. The force increases if the strength of the magnetic field and/or current increases. This is …

### Magnification

The magnification can be calculated if you know the actual size of the object and its image size. Demo In this tutorial you will learn how to calculate …

### Uniform Acceleration

Uniform or constant acceleration is a type of motion in which the velocity of an object changes by an equal amount in every equal time period. Demo In …

### Pressure in Fluids

Fluid pressure is exerted on the surface of an object in a liquid. This pressure causes upthrust . An object placed in a liquid will begin to sink. …

### Acceleration

Acceleration is how quickly the velocity is changing whether it be speed, direction or both. Acceleration is a measure of how quickly the velocity …

### Speed

Speed is how fast an object is moving in no given direction. Velocity is how fast an object is moving in a given direction. …

### Weight on the Moon

Weight is the force acting on an object due to gravity. The weight of an object is defined as the force of gravity on the object …

### Weight on Earth

Weight is the force acting on an object due to gravity. The weight of an object can be defined as the force of gravity on the …

## Elastic Potential Energy

Stretching or squashing an object can transfer energy into its elastic potential energy store.

## What is Elastic potential energy?

Stretching or squashing an object can transfer energy into its elastic potential energy store. Elastic energy is the mechanical potential energy stored in the material. Elastic energy occurs when objects are compressed, stretched or deformed.

## Elastic potential energy equation

To calculate Elastic potential energy we use this equation.

$E_e = { 1 \over2} ke {^2}$

## Elastic potential energy demo

In this tutorial you will learn how to calculate the energy stored in a stretched spring.

## Chilled practice question

A spring is stretched 200 cm. The spring has a spring constant of 30 N/M. Calculate the stored elastic potential energy of the stretched spring.

## Frozen practice question

Calculate the extension of a spring if it has a stored elastic potential energy of 540 J and a spring constant of 30 N/M.

## Science in context

Stretching or squashing an object can transfer energy into its elastic potential energy store.

## Millie’s Master Methods

### Millie’s Magic Triangle

The ability to rearrange equations is the first step to successfully solve Physics calculations. Millie’s Magic Triangle Teaches you to be confident when transposing an equation allowing …

### Calculation Master Method

Performing and mastering this routine will guarantee you maximum marks when solving Physics calculations. Calculation Master Class Top Mark Routine Applying this technique will ensure you gain …

## The Fridge Physics Store

### Teacher Fast Feedback

Feedback to students in seconds – Voice to label thermal bluetooth technology Click …

### Get Fridge Physics Merch

Why not buy a Fridge Physics baseball cap, woollen beanie, hoodie or polo shirt, all colours and sizes available. Free delivery to anywhere in the UK! Fridge …
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