8th Grade Science: Forces and Motion

Front

What is Newton's 1st Law of Motion?

Back

An object at rest remains at rest unless acted upon by a force, and an object in motion remains in motion unless acted upon by a force.

Front

How can you identify a balanced force?

Back

A balanced force means the object is stationary or moving at a constant speed.

Front

What is the definition of speed?

Back

Speed is how fast an object moves, measured as distance traveled over time.

Front

What does Newton's 2nd Law of Motion state?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is the net force?

Back

The net force is the overall force acting on an object when all the individual forces are combined.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (only magnitude), while velocity is a vector quantity (magnitude and direction).

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What does it mean if an object has a net force of 0 N?

Back

It means the object is either at rest or moving at a constant speed.