The First Law of Motion

Front

What is the First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It depends on the mass of the object.

Front

What kinds of objects have inertia?

Back

All objects with mass have inertia.

Front

What is net force?

Back

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

Front

How do you calculate net force?

Back

Net force is calculated by adding all the forces acting on an object, taking into account their direction.

Front

What happens when the net force on an object is zero?

Back

When the net force is zero, the object remains at rest or continues to move at a constant velocity.

Front

What is an example of balanced forces?

Back

Two people pushing a car with equal force in opposite directions.

Front

What is an example of unbalanced forces?

Back

A person pushing a shopping cart forward while another person pulls it backward.

Front

What is the direction of the net force if two forces of 4000 N right and 4000 N left are applied?

Back

The net force is 0 N because the forces are balanced.

Front

What is the magnitude and direction of the net force if a force of 15 N to the left is applied against a force of 14 N to the right?

Back

The net force is 1 N to the left.