linear momentum and impulse

momentum

momentum = mass x velocity

conservation of momentum equation

mu + mu = mv + mv

conservation of KE equation

½ mu² + ½ mu² = ½ mv² + ½ mv²

Elastic collisions

momentum/KE conserved

Inelastic collisions

momentum conserved, some KE lost as heat/sound

Totally inelastic collisions

momentum conserved, some KE lost as heat/sound

unequal masses pushing off eachother from stationary equation

0 = mv + MV

Impulse/momentum equation

impulse = change in momentum

Impulse/force equation

impulse = force x time

Units for impulse

Ns

Object being brought to rest equation

Ft = -mu

Momentum definition

product of an object's mass and velocity

Principle of conservation of momentum

when two or more objects collide the total momentum remains constant provided no external forces act

What are crumple zones designed to do?

increase the time of collision