Momentum, Impulse, Work, Energy and Power

Linear momentum

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.

(Note: there are two acceptable statements of Newton's Second

Law)

Isolated system

No net external forces

Law of conservation of linear momentum

The total linear

momentum of an isolated system remains constant (is conserved)

Elastic collision

as a collision in which both momentum

and kinetic energy are conserved

Inelastic collision

as a collision in which only momentum

is conserved

Impulse

the product of the net force and the contact

time

the work done on an object by a force

as 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

The law of conservation of energy

the total energy in

a system cannot be created nor destroyed, only transformed

from one form to another

The 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 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