Momentum, Impulse, Work, Energy and Power Flashcards
Linear momentum
The product of the mass and velocity of the object.
State:
A vector and is the same direction as the velocity vector.
Newton’s second law in terms of Momentum
The net force acting on an object is equal to the rate of change of momentum.
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 are conserved.
Impulse(J)
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 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 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 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.
The work-energy theorem
The work done by a net force on an object is equal to the change in the kinetic energy of the object.
Power
The rate at which work is done or the rate at which energy is transferred.
Efficiency
The ratio of output power to input power.
