Center of Mass Concepts

The video tutorial introduces the concept of center of mass, explaining it as the average location of a mass distribution. Using a meter stick, the tutorial demonstrates how the center of mass can be identified and balanced. It also introduces the center of gravity, explaining its relation to the center of mass and how gravity affects it. The tutorial further explores finding the center of mass in irregular objects, like a cardboard dolphin, and explains how it follows a parabolic path when thrown. Finally, it covers calculating the center of mass in two-object systems, emphasizing symmetry and mass distribution.

What is the center of mass of a perfectly uniform meter stick?

• At the 0 cm mark

• At the 25 cm mark

• At the 50 cm mark

• At the 75 cm mark

How does adding weight to one side of a meter stick affect its center of mass?

• It shifts towards the lighter side

• It remains unchanged

• It shifts towards the heavier side

• It moves to the center

Where is the center of gravity located in a perfectly uniform meter stick?

• At the 50 cm mark

• At the 0 cm mark

• At the 100 cm mark

• At the 25 cm mark

In a non-uniform object, where is the center of gravity likely to be?

• At the top of the object

• Exactly at the center of mass

• Slightly below the center of mass

• Slightly above the center of mass

What happens to the trajectory of a projectile if it rotates?

• The entire object follows a parabolic path

• Only the center of mass follows a parabolic path

• The tail of the object follows a circular path

• The head of the object follows a straight line

How can you find the center of mass of a cardboard dolphin?

• By balancing it on your finger

• By calculating its volume

• By measuring its length

• By weighing it

In a two-object system with equal masses, where is the center of mass located?

• Closer to the first object

• Outside the line connecting the objects

• Exactly in the middle

• Closer to the second object

If one object in a two-object system is heavier, where is the center of mass?

• Closer to the lighter object

• Closer to the heavier object

• Exactly in the middle

• Outside the line connecting the objects

What is the ratio of distances to the center of mass for two objects with masses 2 kg and 5 kg?

• 2:5

• 5:2

• 1:1

• 3:4

How can the total distance between two objects be divided to find the center of mass?

• Into parts based on their volume

• Into random parts

• Into parts proportional to their masses

• Into equal parts