Newtons Second Law Ch 5

Front

What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F = ma.

Front

What does the formula F = ma represent?

Back

F = ma represents the relationship between force (F), mass (m), and acceleration (a). It indicates that force equals mass times acceleration.

Front

How does mass affect acceleration according to Newton's Second Law?

Back

According to Newton's Second Law, as mass increases, acceleration decreases if the same force is applied, indicating an inverse relationship.

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force in the SI system is the Newton (N).

Front

If a net force of 10 N is applied to a 2 kg object, what is its acceleration?

Back

Using F = ma, acceleration a = F/m = 10 N / 2 kg = 5 m/s².

Front

What is the relationship between force and acceleration?

Back

Force and acceleration are directly proportional; as force increases, acceleration increases, provided mass remains constant.

Front

What happens to the acceleration of an object if the net force acting on it is zero?

Back

If the net force is zero, the object will not accelerate; it will either remain at rest or continue moving at a constant velocity.

Front

What is air resistance?

Back

Air resistance is a type of frictional force that opposes the motion of an object through the air.

Front

How does air resistance affect falling objects?

Back

Air resistance slows down the acceleration of falling objects, causing them to reach a terminal velocity where the force of gravity is balanced by air resistance.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in Newtons (N).