Newton's First Law

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by an unbalanced force.

Front

What does 'inertia' mean?

Back

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

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, changing its velocity.

Front

What happens to a hockey puck on a frictionless surface?

Back

It will continue to slide indefinitely at a constant speed unless acted upon by an unbalanced force.

Front

What is the net force when two equal forces act in opposite directions?

Back

The net force is 0.

Front

What does it mean if an object has zero acceleration?

Back

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

Front

Why does a skydiver slow down after opening a parachute?

Back

The parachute creates an upward force (air resistance) that is greater than the downward force of gravity, resulting in a decrease in speed.

Front

What is the relationship between mass and inertia?

Back

The greater the mass of an object, the greater its inertia.

Front

What is an example of balanced forces?

Back

Two people pulling on opposite ends of a rope with equal force.

Front

How does friction affect motion?

Back

Friction is a force that opposes motion, causing objects to slow down or stop.