Forces, Newton's First & Second Laws Review

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 Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is expressed as F = ma.

Front

How do you calculate acceleration?

Back

Acceleration (a) is calculated using the formula a = F/m, where F is the net force applied and m is the mass of the object.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is friction?

Back

Friction is the force that opposes the motion of two surfaces sliding past each other.

Front

What happens to acceleration if mass increases while the force remains constant?

Back

If mass increases and the force remains constant, the acceleration decreases.

Front

What is net force?

Back

Net force is the total force acting on an object after all the forces are combined.

Front

What is inertia?

Back

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

Front

If a 2.0 kg object has a force of 4.0 N applied, what is its acceleration?

Back

The acceleration is 2 m/s².

Front

What is the effect of an unbalanced force on an object?

Back

An unbalanced force causes an object to accelerate in the direction of the net force.