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Homework answers / question archive / Torque and Equilibrium Online Simulation (Last Revised Mar

Torque and Equilibrium Online Simulation (Last Revised Mar

Physics

Torque and Equilibrium

Online Simulation (Last Revised Mar. 23, 2020)

 

PhET Simulation Used:  Balancing Act

 

Goals

  1. To learn how to calculate torque
  2. To learn the conditions for equilibrium of torque
  3. To be able to distinguish CW and CCW torque

 

Theory

Torque is calculated by the following formula

                        τ= F r sinθ

 

Simulation Setup

Open the PhET Simulation Balancing Act - Balance Lab option on the simulation

 

Choose the balance saw (the right option at the bottom of the page) with supports.

Click on “mass labels” and “rulers” options from the menu on the right.

 

 

 

Activity 1

 

 

Place a 5-kg brick at the 1.5-m mark on the left side of the board. Find the location on the right where a 15-kg brick will balance the board.

 

Calculate the Clockwise and Counterclockwise Torque

CW Torque : _______________________

CCW Torque: ______________________

Are they equal in  magnitude? : ________

 

Activity 2

Place a 10-kg brick at the 1.75-m mark on the left and a 5-kg brick at the 0.5-m mark on the right. What do you need to place on the right to balance the beam?

 

Calculate the CW and CCW torque and see which side needs a boost.

CW Torque: _____________________

CCW Torque: ____________________

Which torque is less in magnitude? __________________

This is the side where you need to place load for additional torque.

 

 

Balance the Beam: Experiment with bricks and positions to balance the beam.

What mass did you use? ______________

At what location? ____________________

 

Compare the CW and CCW torque again.

Total CW Torque: ____________________

Total CCW Torque: ___________________

Are they equal in magnitude?___________

 

Activity 3  Now, we play the game!

 

 

 

Go back to the simulation and choose  Balancing Act -  Game

Select Level 4.

 

 

 

 

 

Play the game until you get the max score on Level 4 -  12.

Include a screenshot of your results with your lab submission for lab credit.

 

 

You may calculate the CW and CCW torque in advance to determine whether something is balanced. You don’t have to guess!!

 

 

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