Newtons Laws and Application of Newton's Laws

• Weight (Fg)

  The gravitational force the Earth exerts on any object on or near its surface.
• Normal Force (Fn)

  the perpendicular force exerted by a

  surface on an object in contact with it
• Frictional force (Ff)

  the force that opposes the motion of

  an object
• Newton’s first law

  An object continues in a state of rest or

  uniform (moving with constant) velocity unless it is acted upon by a

  net or resultant force
• Inertia

  the property of an object that causes it to resist a change in its state of rest or uniform motion
• Newton’s second law

  When a net force, Fnet, is applied to

  an object of mass, m, it accelerates in the direction of the net force.

  The acceleration, a, is directly proportional to the net force and

  inversely proportional to the mass
• Newton’s third law

  When object A exerts a force on object B,

  object B simultaneously exerts an oppositely directed force of

  equal magnitude on object A