Gravitational Mass

Mr. Andersen explains gravitational mass, contrasting it with inertial mass. He discusses Newton's insights on gravitational force, which depends on mass and distance. The video covers measuring gravitational mass using a balance and explores how this measurement remains consistent on the Moon. Historical experiments by Galileo and Newton are highlighted, demonstrating consistent acceleration in free fall. The video concludes with a demonstration from the Apollo 15 mission, confirming Galileo's findings in a vacuum.

What two factors determine the gravitational force between two objects?

• The size of the objects and the distance between them

• The speed of the objects and the distance between them

• The size of the objects and their color

• The speed of the objects and their color

How does gravitational mass differ from inertial mass?

• Gravitational mass is an interaction with speed, while inertial mass is based on gravitational fields

• Gravitational mass is based on color, while inertial mass is based on speed

• Gravitational mass is an interaction with a gravitational field, while inertial mass is based on force interactions

• Gravitational mass is based on speed, while inertial mass is based on color

What happens to the gravitational force if the distance between two objects is decreased?

• The force decreases

• The force remains the same

• The force increases

• The force becomes zero

How can gravitational mass be measured using a balance?

• By comparing it to a known mass and adjusting the balance point

• By measuring the speed of the object

• By comparing it to a known speed

• By measuring the color of the object

What would happen to the measurement of gravitational mass if a balance is taken to the moon?

• The measurement would be different

• The measurement would remain the same

• The balance would not work

• The balance would measure weight instead

What did Galileo's experiments demonstrate about objects with different masses?

• They fall with varying speeds

• They fall with the same acceleration

• They fall with different accelerations

• They do not fall at all

What was demonstrated by Dave Scott on the Apollo 15 mission?

• A feather and a hammer fall at different rates on the moon

• A feather and a hammer fall at the same rate on the moon

• A feather falls faster than a hammer on the moon

• A hammer falls faster than a feather on the moon