Topic 4: Newton's Second Law

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 (Force = mass × acceleration).

Front

What is the formula to calculate force?

Back

The formula to calculate force is F = ma, where F is force, m is mass, and a is acceleration.

Front

If a 3kg object is accelerated at 5m/s², what is the force applied?

Back

The force applied is 15N (calculated using F = ma: F = 3kg × 5m/s²).

Front

What does inertia refer to in the context of Newton's Second Law?

Back

Inertia is the tendency of an object to resist changes in its state of motion. The more mass an object has, the greater its inertia.

Front

How does mass affect acceleration when the same force is applied?

Back

When the same force is applied, an object with less mass will accelerate more than an object with more mass.

Front

What is the relationship between force and acceleration?

Back

Force and acceleration have a direct relationship; as force increases, acceleration increases, provided mass remains constant.

Front

What is the relationship between mass and acceleration?

Back

Mass and acceleration have an inverse relationship; as mass increases, acceleration decreases when the same force is applied.

Front

What type of relationship exists when one variable increases while another decreases?

Back

This is called an inverse relationship.

Front

What is an example of Newton's Second Law in everyday life?

Back

Pushing a shopping cart: the harder you push (more force), the faster it accelerates, and a heavier cart requires more force to achieve the same acceleration.

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.