mechanics Flashcards
linear momentum
the product of the mass and velocity of the object
p=mv
newtons 2nd law in terms of momentum
the net force acting on an object is equal to the rate of change of momentum
Fnet.t = m(delta)v
law of conservation of linear momentum
the total linear momentum of an isolated system remains constant (is conserved)
pi= pf
isolated system
a system free from the influence of a net external force that alters the momentum of the system
elastic collision
both momentum and kinetic energy are conserved
inelastic collision
only momentum is conserved
work
product of the displacement and the component of the force parallel to the displacement
done BY a force ON an object
work energy thereom
the work done by a net force on an object is equal to the change in kinetic energy of the object
kinetic energy
the energy an object has as a result of the objects motion
potential energy
the energy an object possesses due to its position relative to a reference point
law of conservation of energy
total energy in a system cannot be created nor destroyed; only transformed from one form to another
mechanical energy
the sum of the gravitational and kinetic energy of a body at a point
principle of conservation of mechanical energy
in the absence of air resistance or any external forces , the mechanical energy of an object is constant
(only for isolated systems)
