Physical Science Review: Force and Motion

Front

What is a frame of reference?

Back

A frame of reference is a set of criteria or stated values in relation to which measurements or judgments can be made. It is essential for understanding motion.

Front

How does motion appear from different frames of reference?

Back

Motion can appear differently depending on the observer's frame of reference. For example, a bus may seem to be moving backward to a passenger on another bus that is moving forward.

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces acting on it are combined. It determines the object's motion.

Front

What happens to an object at rest in terms of net force?

Back

If an object is at rest, the net force acting on it is zero, meaning all forces are balanced.

Front

What is the effect of balanced forces on an object in motion?

Back

If the forces acting on an object are balanced, the object will continue to move at a constant speed in a straight line.

Front

What is gravity?

Back

Gravity is a force that attracts two bodies toward each other, commonly experienced as the force that pulls objects toward the Earth.

Front

What is drag force?

Back

Drag force is the resistance force that acts opposite to the direction of motion of an object moving through a fluid (like air or water).

Front

What occurs when drag force equals gravitational force?

Back

When drag force equals gravitational force, the object falls at a constant speed, known as terminal velocity.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed that a freely falling object eventually reaches when the resistance of the medium prevents further acceleration.

Front

What is the relationship between mass and gravitational force?

Back

The gravitational force acting on an object is directly proportional to its mass; greater mass results in a stronger gravitational pull.