Linear Momentum
Momentum is defined as p=mv (momentum = mass x velocity)
It is a vector, the sign/direction is important, unlike energy
A change in momentum is an impulse which is defined as F∆t=∆p (Force x time elapsed = impulse(change in momentum))
Momentum is conserved in all collisions
Types of collisions:
Elastic->kinetic energy is conserved
Inelastic-> kinetic energy not conserved -> objects stick together
No is perfectly either one, always somewhere in between
Easy formula for a perfectly elastic collision -> -(va-vb=v'b+v'a)
Interacts with Kinematics (1D Kinematics and 2D Kinematics)
Sample problem
Follows p=p' (no external impulse to the system)
Center of Mass
The one point that moves in the same path that a particle would move had it of been subjected to the same force
Position relative to an origin x=(maxa + mbxb)/(ma+mb)
Angular Moment
Ben's rotational momentum part Rotation
Momentum
Linear Momentum
Momentum is defined as p=mv (momentum = mass x velocity)
It is a vector, the sign/direction is important, unlike energy
A change in momentum is an impulse which is defined as F∆t=∆p (Force x time elapsed = impulse(change in momentum))
Momentum is conserved in all collisions
Types of collisions:
- Elastic->kinetic energy is conserved
- Inelastic-> kinetic energy not conserved -> objects stick together
No is perfectly either one, always somewhere in betweenEasy formula for a perfectly elastic collision -> -(va-vb=v'b+v'a)
Interacts with Kinematics (1D Kinematics and 2D Kinematics)
Sample problem
Follows p=p' (no external impulse to the system)
More help on
um/Momentum
Center of Mass
The one point that moves in the same path that a particle would move had it of been subjected to the same force
Position relative to an origin x=(maxa + mbxb)/(ma+mb)
Angular Moment
Ben's rotational momentum part Rotation