momentum and impulse Flashcards
Momentum
It is the product of the mass and velocity of the object.
Newton’s Second law in terms of momentum
The net force acting on an object is equal to
the rate of change of momentum.
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.
The law of conservation of momentum
– The total linear momentum of an isolated system
remains constant.
An elastic collision
– A collision in which both momentum and kinetic energy are conserved.
An inelastic collision
– A collision in which only momentum is conserved.
Impulse –
The product of the net force and the contact time.
Gravitational potential energy
The energy an object possesses due to its position relative
to a reference point.
Kinetic energy
The energy an object has as a result of the object’s motion.
Mechanical energy
The sum of gravitational potential and kinetic energy at a point.
Law of conservation of energy
The total energy in a system cannot be created nor
destroyed; only transformed from one form to another.
Principle of conservation of mechanical energy –
In the absence of air resistance or any
external forces, the mechanical energy of an object is constant.
