Center of Mass Introduction

The video tutorial explains the concept of center of mass, using examples like a lacrosse ball and a hammer in projectile motion. It clarifies the difference between center of mass and center of gravity, especially in a constant gravitational field. Various objects, including a baseball bat and a Frisbee, are shown in projectile motion, highlighting their center of mass. The tutorial also covers systems of objects, such as ice cubes connected by a rod, and demonstrates how to find the center of mass in irregularly shaped objects using a hanging method.

What is the center of mass of an object with constant density and symmetrical shape?

• At the geometric center of the object

• At the bottom of the object

• Outside the object

• At the top of the object

In a constant gravitational field, how do the center of mass and center of gravity relate?

• They are at opposite ends of the object

• They are in the same location

• They are always at the bottom of the object

• They are unrelated

What path does the center of mass follow during projectile motion?

• A zigzag path

• A parabolic path

• A circular path

• A straight line

Where is the center of mass located for a Frisbee ring?

• At the top of the ring

• In the geometric center, not on the ring

• At the bottom of the ring

• On the outer edge of the ring

How does the center of mass behave in a system of objects connected by a rod?

• It moves in a straight line

• It remains stationary

• It moves randomly

• It follows a parabolic path

What happens when a force is applied directly at the center of mass of an object?

• The object remains stationary

• The object rotates

• The object moves in a circle

• The object accelerates linearly

How can you find the center of mass of an irregularly shaped flat object?

• By measuring its weight

• By drawing vertical lines from different hanging points

• By observing its color

• By calculating its volume