Impulse Momentum
momentum- ✅✅ p =m*v (kg x m/s)
equal to the mass of the object times the object’s velocity; is a vector
impulse- ✅✅ J = F * △t (N x s)
area under F/t graph
impulse-momentum theorem- ✅✅
only external impulse can change an
object’s momentum; J = △p and F * △t = pF-po
Fpeak- ✅✅point of maximum compression
Favg-✅✅= 0.5Fmax
greatest impulse-✅✅object bounces back and hurts the most
system of interest; isolated-✅✅momentum is conserved in collisions, if
and only if, ALL colliding objects are considered to be part of the
________________________ (A+B) and system is ______________ (no
external forces are present)
po=pf or △p =0
✅✅
elastic collision- momentum is conserved; kinetic energy is conserved;
objects bounce and there is no damage; examples: billiard balls, bumper
cars (greater impulse leads to bounce)
✅✅
inelastic collision- momentum is conserved; kinetic energy is not
conserved; objects bounce, damage or not; examples: any soft ball, real
cars
✅✅
perfectly inelastic collision- momentum is conserved; kinetic energy is
not conserved; objects stick, damage or not; examples: clay balls, railroad
cars, real cars
momentum- ✅✅ p =m*v (kg x m/s)
equal to the mass of the object times the object’s velocity; is a vector
impulse- ✅✅ J = F * △t (N x s)
area under F/t graph
impulse-momentum theorem- ✅✅
only external impulse can change an
object’s momentum; J = △p and F * △t = pF-po
Fpeak- ✅✅point of maximum compression
Favg-✅✅= 0.5Fmax
greatest impulse-✅✅object bounces back and hurts the most
system of interest; isolated-✅✅momentum is conserved in collisions, if
and only if, ALL colliding objects are considered to be part of the
________________________ (A+B) and system is ______________ (no
external forces are present)
po=pf or △p =0
✅✅
elastic collision- momentum is conserved; kinetic energy is conserved;
objects bounce and there is no damage; examples: billiard balls, bumper
cars (greater impulse leads to bounce)
✅✅
inelastic collision- momentum is conserved; kinetic energy is not
conserved; objects bounce, damage or not; examples: any soft ball, real
cars
✅✅
perfectly inelastic collision- momentum is conserved; kinetic energy is
not conserved; objects stick, damage or not; examples: clay balls, railroad
cars, real cars
