Level 5 - Recognising the steps - SPA

• physics
• Middelbare school
• havo
• Leerjaar 3

Level 5 - recognising the steps - SPA

Level 5 - recognising the steps - SPA

Well done, you have made it to level 5 already. Using the formulas from level 3 and level 4, we can use the Standard Problem Approach (SPA) method to attack our physics problems.

This strategy can attack any problem and is making the solutions a lot easier to find!!!

Level 5 - recognising the steps - SPA

The SPA method consists of 4 steps:

1. Given -        here you list all the information available in the problem.

2. Required  - here you state the variable that you need to find.

3. Working -  here you write down your calculations with the formulas                                 that you use. In the end, you will state your final answer.

4. Check -       During the check, you check if your answer includes the                                  right unit and you check if the answer is possible.

Challenge 1 - Which variables are given in the problem?

Given:

A curling iron is connected to a 230 V socket and uses 4 A of current.

What is the power rating of the curling iron?

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Challenge 1 - Which variables are required in the problem?

Required:

A curling iron is connected to a 230 V socket and uses 4 A of current.

What is the power rating of the curling iron?

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Challenge 2 - Which variables are given in the problem?

Given:

A household consumes 5 kWh in a total time of 20 hours. 

What is the total power the household is using?

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Challenge 2 - Which variables are required in the problem?

Required:

A household consumes 5 kWh in a total time of 20 hours. 

What is the total power the household is using?

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Challenge 3 - Which variables are given in the problem?

Given:

My laptop has a power rating of 40 W and I used it last schoolday for 600 seconds.

How much energy did my laptop consume?

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Challenge 3 - Which variables are required in the problem?

Required:

My laptop has a power rating of 40 W and I used it last schoolday for 600 seconds.

How much energy did my laptop consume?

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Challenge 4 - Which variables are given in the problem?

Given:

My charger transforms the voltage of the socket(!!, how many volts?) to a smaller voltage of 10 V. For this, it uses a primary coil of 100 turns.

How many turns has the secondary coil?

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Challenge 4 - Which variables are required in the problem?

Required:

My charger transforms the voltage of the socket(!!, how many volts?) to a smaller voltage of 10 V. For this, it uses a primary coil of 100 turns.

How many turns has the secondary coil?

Up

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Level 5 - recognising the steps - SPA

Well done! You have now recognised the starting steps to solving the problem. In level 6, we will use this information to solve the problems we just started. We will also check if these answers are possible. Write it down if you haven't already.

Congratulations! 

Level 5 complete!