7.1.2 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 with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What is the definition of inertia?

Back

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

Front

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

Back

The object is in a state of equilibrium and will not accelerate; it will either remain at rest or continue moving at a constant velocity.

Front

If a force of 8 N is applied to the left and a force of 4 N is applied to the right, what is the net force?

Back

The net force is 4 N to the left.

Front

What does it mean for forces to be balanced?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Front

What is an example of unbalanced forces?

Back

If a 10 N force is applied to the right and a 6 N force is applied to the left, the forces are unbalanced, and the object will accelerate to the right.

Front

What role does friction play in motion?

Back

Friction is a force that opposes motion, causing moving objects to eventually come to a stop.

Front

What is the relationship between mass and inertia?

Back

The greater the mass of an object, the greater its inertia, meaning it will be harder to change its state of motion.

Front

How does Newton's First Law apply to a bowling ball rolling on a surface?

Back

The bowling ball will continue to roll until an unbalanced force, such as friction, acts on it to stop it.

Front

What is the significance of the term 'net force'?

Back

Net force is the vector sum of all the forces acting on an object, determining its acceleration.