2.4 Newton's First Law

• Newton's First Law is also known as the concept of inertia
• What is the relationship between inertia and mass?

  The more massive, the more inertia.
• A tennis ball has low inertia compared to a bowling ball.
• Why does a bowling ball have more inertia than a tennis ball?

  It has more mass.
• When balanced forces act on an object, the net force is zero
• An object moving at a constant velocity with balanced forces acting on it will remain in motion indefinitely.


  True
• What is the relationship between force and acceleration?

  Force causes acceleration.
• What is a net force?

  Sum of all forces on an object.
• Newton's First Law is also known as the Law of Inertia
• What is inertia directly proportional to?

  Mass
• Balanced forces result in no net force and no change in motion.


  True
• Match the type of force with its effect on motion:

  Balanced forces ↔️ No acceleration

  Unbalanced forces ↔️ Acceleration
• Force causes acceleration in the direction of the net force.

  True
• Steps to solve problems related to Newton's First Law:

  1️⃣ Analyze the problem

  2️⃣ Apply Newton's First Law

  3️⃣ Solve mathematically
• What does Newton's First Law state?

  An object at rest stays at rest, and an object in motion stays in motion at constant velocity, unless acted upon by an external force.
• An object at rest with no external force acting on it is in equilibrium.


  True
• Inertia is directly proportional to an object's mass
• Inertia keeps an object in its current state of motion until a force acts upon it.


  True
• Arrange the following statements to differentiate between balanced and unbalanced forces:

  1️⃣ Balanced forces result in no net force.

  2️⃣ Balanced forces cause no change in motion.

  3️⃣ Unbalanced forces result in a net force.

  4️⃣ Unbalanced forces cause acceleration.
• Unbalanced forces cause an object to accelerate
• Forces are vector quantities because they have both magnitude and direction.


  True
• What does Newton's First Law state about an object at rest?

  It remains at rest
• An object at rest has no external force acting on it.

  True
• Match the mass with its corresponding inertia:

  Small mass ↔️ Low inertia

  Large mass ↔️ High inertia
• What is the result of unbalanced forces acting on an object?

  Acceleration
• What type of quantity is force?

  Vector
• Force is the influence that causes acceleration
• What is another name for Newton's First Law?

  Law of Inertia
• Match the scenario with its outcome:

  Car moving at constant speed ↔️ Continues at constant speed

  Soccer ball kicked ↔️ Ball accelerates

  Cyclist braking ↔️ Cyclist slows down