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Rogue Physicist.  Free resources for physics education © 2006-2016 Dorian Pascoe.  Email: dorian@top-school.co.uk

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Kinetic Energy

 

 

 

 

Objectives:

 

  
 

 

 

  

 

• Be able to calculate the kinetic energy of  moving object.

 

 

• Be able to solve numerical problems involving kinetic energy

 

 

• Be able to present calculations methodically and give the correct units with numerical answers.

 

 

  

 

 

 

 

 

Task 1 - Starter

 

  
 

 

I know the answer!

 

 

 

 

  

 

Remind the person next to you:

 

 

 

1) The units used to measure energy.

 

2) The units used to measure work done.

 

3) The units used to measure power.

 

4) The ten types of energy.

 

5) The definition of a "Watt".

 

 

Your teacher will tell you which questions to answer.

 

  

 

 

 

 

 

 

Task 2 - Kinetic energy

 

  
 

 

Calculations!  Yeah!

 

  

 

This formula allows us to calculate the kinetic energy of a moving object.

 

 

 

kinetic energy = ½ × mass × speed2

 

 

 

Use the formula to calculate the kinetic energy of the following objects.  Show full working for each of your calculations.

 

 

1.) A 40kg student running at 3 m/s

 

2.) An 80kg adult running at 3 m/s

 

3.) A 1200kg car travelling at 15 m/s

 

4.) A 1200kg car travelling at 30 m/s

 

5.) A 58g tennis ball travelling at 40m/s

 

 

  

 

 

 
 

 

 

Task 3 - Missing words...

 

  
 

 

 

  

 

Complete the sentences below, by filling in the missing words:

 

 

Click the image above to download this task.

 

  

 

 

 

 

 

 

Task 4 - More complex calculations...

 

  
 

 

Calculations!  Woop!

 

  

 

Your teacher will show you how to use a modified equation triangle to rearrange the formula.

 

 

 

Now, try solving the problems below:

 

Click the image above to download these questions.