Balancing Act

Balancing Act is a simulation from the GoLabz project. The game uses a simulation with a balance scale. Students have to solve problems which involve the relation between weight and position of the weight on the balance scale.

The Balancing Act program is one of many simulations by PHET, designed and developed by the University of Colorado.

Balancing Act

Are students able to find the rule by which all problems can easily be solved?

balance rule

 Purchase  Free
 Hardware  PC, iPad
 Requirements  browser

Energy Skate Park

Energy Skate Park is a simulation from the GoLabz project. The simulation introduces the basics of energy conservation.

The program is one of many simulations by PHET, designed and developed by the University of Colorado.

We have given students age 10-12 some tasks while using this simulation. See below.

 Purchase  Free
 Hardware  PC, iPad
 Requirements  browser


Find out about a skate boarder and design a skate park on Energy Skate Park simulation.

Issues to investigate:


  1. What is mass?
  2. Does the weight of the skater influence his/her speed?If yes, how?
  3. How does the size and weight of the skater influence the total energy?
  4. What does the bar graph tell you about energy?
  5. Use the bar graph to find out what is meant by kinetic energy and potential energy?
  6. The skater continues endlessly? How is this possible? Is this realistic? Why/why not?



  1. What does friction do?
  2. What kind of energy is related to friction?
  3. Does friction have (1) a larger,  (2) a smaller,  or (3) the same impact on a big skater than on a small skater?
  4. Match the concepts in the first column with the correct sentences in the second column.
 1. speed  A.  When the skater is at the top of the track ……  energy is highest.
2. friction  B.  The skater’s weight does not influence the speed.
 3. mass  C.  When still moving the skater has …………  energy.
 4. kinetic energy  D.  The skater is moving faster in the beginning.
 5. potential energy  E.  On a smooth track the skater will go faster.
 6. thermal energy  F.   At the end of the skating tour all energy has been tranferred into heat.
For correct answers see bottom.

skate track


  1. Design a skate track whereby the skater makes a salto and does not fall off the track.
  2. Present the skate track to your classmates and explain what you have done to reach your goal.







answers Skatepark


Every month DiScoro writes about resources that can be used in schools and about inspirational issues. See Services in the Menu for workshops, training etc.

In the Davinci project we used GearSketch to experiment with how gears and chains transmit motion. GearSketch is one of the many resources and programs/simulations available from GoLabz.

It’s always a challenge to come up with interesting tasks that require inquiry and reasoning. Below two tasks where students have to explore both the program as well as features of and patterns within the use of gears.

Task 1: Clockworks


  • Design a combination of gears resulting in a driving wheel showing the hour hand of the clock and another wheel in the gears showing the minutes hand of the clock.





Task 2a: Bicycle


  • Compare the two different bicycles and write down at least five (technical) differences.

Task 2b Bicycle with gears
On a modern bicycle you will often find 6–8 gears on the rear wheel and maybe 2-3 gears on sprocket where the pedals are.

fiets met versnellingen uk

  • Where must the chain lie when you cycle uphill? Explain your answer.
  • Where must the chain lie when you cycle downhill or downwind? Explain your answer.

GoLabz and GearSketch

 Purchase  Free
 Hardware  PC , iPad, tablet
 Requirements  browser

Mechanics: Force Effect

Autodesk Force Effect is an App and webapplication which simulates design concepts from machanics. The App can be used in higher education.

The catchy visualisation of the Force Effect simulations can certainly moti vate the students. It is probably best to use the simulations as an illustrative introduction because the simulations are a simplification of the much more complex rationale behind it. The lecturer should guide the students through the more complex mathematics and mechanics behind the simulations.

 Purchase  Free
 Hardware  iPad, iPod touch, iPhone, Android tablet, PC
 Requirements   iOS 5 (or higher)