How to Answer GCSE Physics Calculations: The 7 Step Method

As you read through the question, list any variables that the question gives you, including their values and units. You can write the whole word, such as mass, or use the correct symbol, such as m.

You should also include the variable you need to calculate and put a question mark next to it.

For example:

• Mass = 5 kg

• Volume = 2 m³

• Density = ?

This gives you a clear list of the information you have and what you need to find.

Now that you have listed your variables, you can use your GCSE Physics equations sheet to find an equation containing the variables you need.

Some variables appear in several different equations, so make sure you choose the equation that contains the variables you have been given and the variable you need to find.

For more complex calculations you may need to use 2 or even 3 equations, 

You may need to rearrange the equation to make the unknown variable the subject.

You can use algebra to do this, or you may have been taught to use an equation triangle. Remember that equation triangles do not work for every equation, so make sure you understand when they can be used.

I will be writing a future article explaining how to rearrange Physics equations correctly.

This step is important.

Before you type the calculation into your calculator, make sure you write the calculation on your exam paper first.

For example, don't simply type numbers into your calculator and write down the answer. Show the calculation that you have entered.

If you make a mistake when entering the calculation into your calculator, you can still receive method marks for the correct working you have shown on your exam paper.

Now you can enter your calculation into your calculator.

It is worth quickly entering it again to check that you get the same answer twice. It only takes a few seconds and could catch a simple calculator error.

Once you're happy with your answer, write it down clearly.