2.1.2 Newton's Laws of Motion

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

  Inertia
• An object in motion will stop moving unless acted upon by an unbalanced force.
• Inertia is the tendency of an object to resist changes in its state of motion.
• What is the tendency of an object to resist changes in its state of motion called?

  Inertia
• What is another name for Newton's First Law of Motion?

  Law of Inertia
• What example is given to illustrate inertia when an object is at rest?

  A book on a table
• The formula for Newton's Second Law of Motion is $F =$$ma$.
• The greater the force applied to an object, the greater its acceleration.
• Throwing a baseball with more force will increase its acceleration, assuming its mass stays constant.
• Newton's First Law of Motion is also known as the Law of Inertia
• A book on a table remains still unless an unbalanced force is applied to it.
• Newton's First Law states that objects at rest stay at rest unless acted upon by an unbalanced force.
• In the formula F = ma, force is measured in Newtons.
• Newton's Third Law of Motion states that for every action force there is an equal and opposite reaction force.
• For every action force, there is an equal and opposite reaction force.
• Action and reaction forces have the same magnitude but opposite directions.
• An object at rest will remain at rest unless acted upon by a balanced force.

  False
• Why does a book on a table remain still?

  Balanced forces
• What is the role of unbalanced forces in changing the state of motion of an object?

  Cause changes
• Arrange the following examples in order of increasing unbalanced force required:

  1️⃣ A book on a table

  2️⃣ A ball rolling on the ground

  3️⃣ A car coasting to a stop

  4️⃣ A person in a moving car stopping suddenly
• An object in motion will remain in motion at a constant velocity unless acted upon by an unbalanced
• An object in motion continues at a constant velocity if there is no unbalanced force
• What does Newton's Second Law of Motion state in words?

  Force equals mass times acceleration
• What unit is used to measure mass in Newton's Second Law?

  Kilograms
• Applying a greater force to a heavy box will result in a greater acceleration
• What happens to the acceleration of a baseball if more force is applied to it, assuming its mass remains constant?

  Increases
• Inertia is the tendency of an object to resist changes in its state of motion.
• What happens to a book on a table according to Newton's First Law if no unbalanced force is applied?

  It stays stationary
• Newton's Second Law of Motion states that force equals mass times acceleration.
• What happens to the acceleration of a heavy box if a greater force is applied to it according to Newton's Second Law?

  Increases
• What is another name for Newton's Third Law of Motion?

  Action-Reaction Principle
• When you kick a ball, the ball exerts an equal and opposite force back on your foot
• Match the example with the action and reaction forces:

  Firing a gun ↔️ Gunpowder pushes bullet forward ||| Bullet pushes gun backward

  Walking ↔️ Foot pushes ground backward ||| Ground pushes foot forward

  Sitting in a chair ↔️ Body presses down on chair ||| Chair pushes up on body
• What is inertia the tendency of an object to resist?

  Changes in its motion
• What is the formula for Newton's Second Law of Motion?

  $F =$$ma$
• If a force of 10 N is applied to a mass of 2 kg, the acceleration will be 5 m/s².
• Match the example with its explanation under Newton's Second Law:

  Pushing a grocery cart ↔️ Force is proportional to acceleration

  Lifting a heavy box ↔️ More force needed for greater mass

  Accelerating a car ↔️ Greater engine force, greater acceleration
• When the engine applies more force, the car accelerates
• When you kick a ball, the ball exerts an equal and opposite force back on your foot
• What is the reaction force when you push a wall forward?

  The wall pushes back