Lesson 7.2 "Using the Law of Universal Gravitation"

Because it helps us predict the movement of planets and satellites.

Because it explains why objects fall to the ground.

Because it helps us understand the concept of weight.

Because it is necessary for space travel.

Inertial mass is related to an object's resistance to acceleration, while gravitational mass determines the strength of gravitational attraction.

Inertial mass determines the strength of gravitational attraction, while gravitational mass is related to resistance to acceleration.

Both inertial mass and gravitational mass are unrelated to gravity.

Inertial mass and gravitational mass are always equal by definition.

Orbital speed

Orbital period

Orbital radius

Both orbital speed and period

It acts only when objects are touching.

It acts over a distance and surrounds any object with mass.

It only affects objects with no mass.

It is measured in kg/m.

Gravity is a force between two objects.

Mass causes space to be curved.

Einstein’s theory predicts how massive objects affect one another.

Einstein’s theory has never been tested.

Gravitational mass determines the strength of gravitational force, while inertial mass determines resistance to acceleration.

Gravitational mass and inertial mass are exactly the same in all contexts.

Inertial mass determines the strength of gravitational force, while gravitational mass determines resistance to acceleration.

Gravitational mass only applies to objects on Earth, while inertial mass applies everywhere.