Apologia Physical Science Module 9

Front

What is the definition of motion?

Back

Motion is the change in position of an object over time.

Front

Is motion relative?

Back

Yes, motion is relative, meaning it depends on the observer's point of view.

Front

What is a reference point?

Back

A reference point is a stationary object used to measure the position of another object.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object.

Front

What is free fall?

Back

Free fall is the state of an object falling under the influence of gravity alone, with no air resistance.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed an object reaches when the force of gravity is balanced by air resistance.

Front

What is the difference between scalar and vector quantities?

Back

Scalar quantities have only magnitude (e.g., speed), while vector quantities have both magnitude and direction (e.g., velocity).

Front

What happens to the acceleration of two objects in free fall?

Back

The acceleration is the same for both objects regardless of their mass.

Front

Who is motionless relative to a passenger in a car?

Back

The driver is motionless relative to the passenger.

Front

What is velocity?

Back

Velocity is the speed of an object in a specific direction.