Momentum and Impulse

• Momentum (p) = m x v
• MOMENTUM: LINEAR MOMENTUM or MOMENTUM is a measure of the difficulty encountered in bringing an object to rest.
• A moving object has momentum - it has its mass in motion (mass and velocity)
• LAW OF INERTIA: An object will not change its motion unless acted on by an unbalanced force
• Objects with greater mass have more inertia. It takes more force to change their motion
• Inertia is another property of mass that resists changes in velocity; however, inertia depends only on mass, and it is a scalar quantity.
• Momentum is a property of moving mass that resists changes in a moving object's velocity. It is a vector quantity.
• If two objects move at the same velocity, a more massive object has a greater inertia in motion therefore a greater momentum.
• If two objects have the same mass, a faster object has a greater velocity and is more difficult to stop thus, has greater momentum.
• Linear Momentum is the product of the mass and velocity of an object. Like velocity, linear momentum is a vector quantity, possessing a direction as well as a magnitude

  p = mv

  p = momentum

  m = mass

  v = velocity
• IMPULES: Momentum changes when a net force is applied. A force is needed to produce change in the body's momentum through a combination of changes in its mass and/or velocity
• Impulse refers to an external force acting on an object over a specific time which leads to a change in momentum of the object

  I = Ft

  I = Impulse

  F = force

  t = time
• FORCE (N) = CHANGE IN MOMENTUM (kg / TIME OF CHANGE (s)
• (FORCE)(time): A change in momentum in a short time requires a LARGE FORCE
• (TIME)(force): A change in momentum in a long time requires a SMALL FORCE