5.6.4 Newton's Laws of Motion

• Inertia is an object's tendency to resist changes in its state of motion
• Newton's First Law states that an object in motion will stay in motion unless acted upon by an unbalanced force.


  True
• What is the formula for Newton's Second Law of Motion?

  F = ma
• Newton's Second Law states that force equals mass times acceleration.


  True
• In Newton's Third Law, action and reaction forces act on different objects
• Order the steps involved in applying Newton's First Law to an object in motion:

  1️⃣ Object is in motion

  2️⃣ Unbalanced force is applied

  3️⃣ Object changes velocity
• Newton's First Law of Motion is also known as the **Law of Inertia
• Inertia is an object's tendency to resist changes in its state of motion
• An object at rest will stay at rest according to Newton's First Law of Motion.


  True
• Match the factor with its description and units:

  Force (F) ↔️ The push or pull on an object; Newtons (N)

  Mass (m) ↔️ The amount of matter in an object; Kilograms (kg)

  Acceleration (a) ↔️ The rate of change of velocity; Meters per second squared (m/s²)
• What is another name for Newton's Third Law of Motion?

  Law of Action and Reaction
• The action and reaction forces are equal in magnitude
• Rocket propulsion is an example of Newton's Third Law in action.


  True
• A parked car remains at rest until the engine force overcomes its inertia
• What is another name for Newton's First Law of Motion?

  Law of Inertia
• Match the state of motion with its description:

  Object at Rest ↔️ Stays at rest

  Object in Motion ↔️ Stays in motion
• The unit of force in Newton's Second Law is the Newton
• What is another name for Newton's Third Law of Motion?

  Law of Action and Reaction
• When you walk, the ground pushes back on your feet, which is an example of Newton's Third Law.

  True
• What two forces eventually bring a kicked soccer ball to a stop?

  Friction and air resistance
• An object in motion will stay in motion unless acted upon by an unbalanced force.


  True
• What is the tendency of an object to resist changes in its motion called?

  Inertia
• Newton's Second Law of Motion states that the force (F) acting on an object is equal to its mass (m) multiplied by its acceleration
• What is the formula for Newton's Second Law of Motion?

  F = ma
• If a force of 10 N is applied to a 2 kg mass, the acceleration will be 5 m/s².
• For every action force, there is an equal and opposite reaction force.

  True
• The action force is applied to one object
• What example illustrates Newton's Third Law when walking?

  Feet push ground, ground pushes back
• Match the application with the relevant law of motion:

  Car Starting ↔️ First Law

  Force Impact on Acceleration ↔️ Second Law

  Walking ↔️ Third Law
• When you take a step, your feet push back on the ground, and the ground pushes forward on your feet