# aqa-trilogy-paper-2-solution

## 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.

## Demo

In this tutorial you will learn how to calculate the **force** on a spring given its **extension** and** spring constant**.

**Note-**Some mobile devices may require you to tap full screen during playback to view video content.

The equation for this calculation is written like this:

$F = { \text k \; \text x \; \text e}$

## Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

A spring is stretched 0.25 **m**, it has a **spring constant** of 20 **N/m**, calculate the force on the spring.

## Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed..

A **force** of 10 **N** is applied to a spring and it extends by 20 **cm**, calculate its **spring constant**.

## Science in context

When a spring is stretched or compressed, its length will changes by an amount x from its original length, **force** **F = k**e. The **force** the spring exerts is its restoring **force**, it acts to restore the spring to its original length.

## Millie’s Master Methods

## The Fridge Physics Store

## 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 object over a **distance** of 1 **m**.

## Demo

In this tutorial you will learn how to calculate the **work done** to move an object through a known **distance**.

**Note-**Some mobile devices may require you to tap full screen during playback to view video content.

The formula for this equation is written like this:

**w = f x d**

## Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

How much work has been done if a car is pushed along the road 550 **cm** with a force of 400** N** ?

## Frozen practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

75 **J** of work is done pulling a trolley 150 **cm**. Calculate the force applied.

## Science in context

**Work** can be calculated with the **equation**: **Work** = **Force** × **Distance**. The unit for **work** 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 object over a **distance** of 1 **m**.