Chapter 6 - Forces In Motion Section 3 – Momentum pp
MOMENTUM Momentum is a property of a moving object that depends on its mass and velocity. Momentum is a property of a moving object that depends on its mass and velocity. The more momentum an object has, the harder it is to stop the object or change its direction. The more momentum an object has, the harder it is to stop the object or change its direction.
MOMENTUM Equation for Momentum – Equation for Momentum – p = m∙v p = m∙v Where p = momentum, m= mass and v = velocity
MOMENTUM The units of momentum are kilograms multiplied by meters/second Or kg∙m/s Like velocity, momentum has a direction
MOMENTUM Complete Math Focus on p. 167 Complete Math Focus on p. 167
THE LAW OF CONSERVATION OF MOMENTUM When a moving object hits another object, some or all of the momentum of the first object is transferred to the object that is hit. If only some of the momentum is transferred, the rest of the momentum stays with the first object. When a moving object hits another object, some or all of the momentum of the first object is transferred to the object that is hit. If only some of the momentum is transferred, the rest of the momentum stays with the first object.
THE LAW OF CONSERVATION OF MOMENTUM
OBJECTS STICKING TOGETHER Sometimes objects stick together after they hit one another. After they stick together, they move as one object. The total masses of the objects stays the same. The velocity of each object changes. The total momentum before and after the collision stays the same. Sometimes objects stick together after they hit one another. After they stick together, they move as one object. The total masses of the objects stays the same. The velocity of each object changes. The total momentum before and after the collision stays the same.
OBJECTS BOUNCING OFF EACH OTHER In some collisions, the objects bounce off each other. During these types of collisions, momentum usually gets transferred from one object to another object. The transfer of momentum causes the objects to move in different directions at different speeds. However, the total momentum of all the objects will stay the same before and after the collision. In some collisions, the objects bounce off each other. During these types of collisions, momentum usually gets transferred from one object to another object. The transfer of momentum causes the objects to move in different directions at different speeds. However, the total momentum of all the objects will stay the same before and after the collision.
CONSERVATION OF MOMENTUM AND NEWTON’S THIRD LAW Action – Reaction Forces Action – Reaction Forces