Summing It Up

• Acceleration


  Directly proportional to the net force acting on it<|>Inversely proportional to its mass
• Greater the force


  Greater the acceleration of a body with the same mass
• Lesser the mass


  Greater the acceleration of a body acted upon by the same net force
• Action-reaction principle


  For every action, there is an equal and opposite reaction<|>When a body exerts a force on another body, an equal amount of force is exerted back on it
• Newton's first law


  An object at rest will remain at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force
• Net force acting on an object becomes greater than zero


  Object at rest will move and an object moving at constant velocity will accelerate
• Newton's law of acceleration

  Applies to objects moving in uniform circular motion
• Centripetal force


  Any force that pulls an object toward the center of a circle, is required for an object to move along a circular path