Finding Centre of the Mass of a Ruler

The video tutorial demonstrates how to find the center of mass using a ruler and fingers. It begins with a simple explanation of the center of mass and progresses to balancing a ruler with added weight. The instructor introduces a technique using fingers to locate the center of mass easily. The tutorial concludes with an experiment involving cubes to further explore balance and the center of mass.

What happens to the center of mass when a weight is added to one side of a ruler?

• It disappears.

• It shifts away from the weight.

• It remains in the middle.

• It shifts towards the weight.

What is the trick to find the center of mass using your fingers?

• Keep your fingers still.

• Move your fingers towards each other.

• Use only one finger.

• Move your fingers away from each other.

How does moving your fingers slowly or quickly affect finding the center of mass?

• It is impossible to find the center of mass.

• Moving slowly is more accurate.

• Moving quickly is more accurate.

• Speed does not matter.

What should you do to find the center of mass when using cubes?

• Place cubes randomly.

• Place cubes on different places and adjust finger positions.

• Use only one cube.

• Place cubes symmetrically.

What is the effect of starting with one finger on the side and one in the middle?

• It is not possible to find the center of mass this way.

• It has no effect.

• It makes finding the center of mass harder.

• It makes finding the center of mass easier.