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14 Cards in this Set

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elastic collision
a collision in which colliding objects rebound without lasting deformation or the generation of heat
impulse
the product of the force acting on an object and the time during which it acts
impulse-momentum relationship
Impulse is equal to the change in the momentum of the object that the impulse acts on. In symbol notation:

Ft=∆mν
inelastic collision
a collision in which the colliding objects become distorted, generate heat, and possibly stick together
law of conservation of momentum
When no external net force acts on an object or a system of objects, no change of momentum takes place. Hence, the momentum before an event involving only internal forces is equal to the momentum after the event:

mv(before event) = mv(after event)
momentum
the product of the mass of an object and its velocity
conservation of energy
Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes. In an ideal machine, where no energy is transformed into heat,

(work)input = (work)output and (Fd)input = (Fd)output
kinetic energy
energy of motion, described by the relationship:

kinetic energy = ½mv²
machine
a device for multiplying forces or simply changing the direction of forces
potential energy
the stored energy that a body possesses because of its position
power
the time rate of work:

power = work/time
watt
the unit of power (1 joule per second)
work
the product of the force and the distance thought which the force moves:

W = Fd
work-energy theorem
The work done on an object is equal to the enegy gained by the object:

Work = ∆E