momentum Flashcards
what is newton’s first law of motion
an object remains at rest or in uniform motion unless acted on by a force
what is newton’s second law of motion
resultant force is proportional to the change of momentum per second
what is impulse
the force x the time for which the force acts
what does the area under the line of a force-time graph represent
the change in momentum or impulse of the force
what is the principle of conservation of momentum
for a system of interacting objects the total momentum remains constant, provided no external resultant force acts on the system
what is an elastic collision
one where there is no loss of kinetic energy
what is an inelastic collison
where the colliding objects have less kinetic energy after the collision than before the collision
what is newton’s third law of motion
when two objects interact they exert equal and opposite forces on each other
