Newton's laws of motion

• According to Newton's First Law, what will happen to an object's motion if it's not acted upon by an external force?


  An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity
• What type of force occurs when two objects are touching?

  Contact force
• What is inertia?


  The tendency of an object to resist changes in its motion
• What happens to an object's motion if it's not acted upon by an external force?


  It maintains its velocity or remains still
• Newtons First Law of Motion


  An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force
• Newtons Third Law of Motion


  For every force applied to an object, there is an equal and opposite force exerted by the object on the applied force
• How does mass affect acceleration?


  Mass affects acceleration by requiring more force to achieve a given acceleration for larger masses, and less force for smaller masses
• Newtons Second Law of Motion (F = ma)


  The acceleration of an object is directly proportional to the force applied and inversely proportional to the object's mass
• F = ma equation


  The formula for Newton's Second Law of Motion, relating force, mass, and acceleration
• What is the unit of force?


  Newtons (N)