8th Grade STAAR Force, Motion, & Energy Review

Front

What term describes why objects resist changes in their state of motion?

Back

Inertia: The tendency of an object to remain at rest or in uniform motion unless acted upon by an external force.

Front

What is the definition of balanced forces?

Back

Balanced Forces: Forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

What does a constant speed graph look like?

Back

A straight line on a distance-time graph indicates constant speed.

Front

What happens to an object when it is not accelerating?

Back

The object maintains its current state of motion, either at rest or moving at a constant speed.

Front

How do you calculate acceleration?

Back

Acceleration = Force / Mass (a = F/m).

Front

What is the unit of force?

Back

Newton (N): The unit of force in the International System of Units (SI).

Front

What is the relationship between mass and acceleration?

Back

According to Newton's second law, acceleration is inversely proportional to mass when force is constant.

Front

What is friction?

Back

Friction: A force that opposes the motion of an object, caused by the contact between surfaces.

Front

What is the formula for calculating net force?

Back

Net Force = Total Forces acting on an object (considering direction).

Front

What does it mean if an object is in motion?

Back

An object is in motion if its position changes relative to a reference point over time.