12 terms

mass

the amount of matter in an object; SI unit for measuring mass is the kilogram.

inertia

a body at motion stays in motion unless acted on by an outside force and a body at rest stays at rest.

momentum

mass in motion; a measure of how hard it is to stop the object

Law of Conservation of Momentum

for a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision

collision

a situation in which two objects in close contact exchange energy and momentum.

elastic collision

two bodies in which the total kinetic energy of the two bodies after the encounter is equal to their total kinetic energy before the encounter

inelastic Collision

a collision in which kinetic energy is not conserved due to the action of internal friction

friction

force that opposes motion between two surfaces.

gravity

force that pulls all objects together

"closer the objects, the harder the pull"

"greater the mass, larger the pull"; acceleration due to gravity is 9.8 m/s/s on earth (if it weren't for air resistance).

"closer the objects, the harder the pull"

"greater the mass, larger the pull"; acceleration due to gravity is 9.8 m/s/s on earth (if it weren't for air resistance).

velocity

the speed of the object and the direction of its motion.

impulse

change in momentum

momentum equation

mass multiplied by velocity