Momentum, Impulse, Work, Energy & Power Flashcards
Linear Momentum
The product of mass and velocity of an 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
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
Ek before= Ek after
inelastic collision
a collision in which only momentum
is conserved
Ekbefore not = Ek after
impulse (J)
the product of the net force and the contact time (of an object)
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
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(Tension,Friction and Applied force), the mechanical energy of an object is constant
the work–energy theorem
work done by a net force on an object is equal to the change in the kinetic energy of the object
power
rate at which work is done
efficiency
the ratio of output power to input power
