Momentum, Impulse, Work, Emergy and Power. Flashcards
Momentum
The products of the mass and velocity of the object
Newtons second law (in terms of momentum)
The net force acting on an object’s is equal to the rate of change of momentum
Isolated (or closed) system
A system that has no net external force acting on it
Law of conservation of linear momentum
The total linear momentum of an isolated system remains constant (is conserved)
Elastic collision
A collision in which both momentum and Kinetic energy is conserved
Inelastic collision
A collision in which only momentum is conserved
Impulse
The product of the net force and the contact time
Work done on an object by a force
The product of the displacement and the component of the net force parallel to the displacement
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 objects motion
Mechanical energy
This sum of gravitational potential and kinetic energy at a point
Law of conservation of energy
The total energy in the system cannot be created nor destroyed; only transferred 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
Work-energy theorem
The work done by net force on an object to is equal to the change in the kinetic energy of the object
Power
The rate at which work is done
