000_Linear_Momentum.pdf - Introduction Linear Momentum 1...

1
Introduction
Stefan Bracher
Linear Momentum

2
Linear Momentum
●
Introduction
●
Conservation of Linear Momentum
●
Elastic and Inelastic Collisions
●
Explosions
●
Rocket Equation
Mechanics
Stefan Bracher

3
Introduction
Stefan Bracher
Linear Momentum A vector describing the „quantity of motion“,
taking into account the mass of the object,
the speed as well as the direction of the
movement.
Impulse The change in momentum during a specific
amount of time, due to an external force.
Linear Momentum
⃗
P = m ⋅ ⃗ v
⃗
J =
⃗
P
f
−
⃗
P
i
=
⃗
F ⋅Δ t

4
Conservation of Linear Momentum
Stefan Bracher
Linear Momentum of an object, or a group of objects is CONSERVED.
Momentum at t
2
= Momentum at t
1
+- Change through external Impulse
Examples:
Linear Momentum
∑
⃗
P
2
=
∑
⃗
P
1
+
⃗
J
⃗
P
i
= m ⋅⃗ v
i
⃗
J =
⃗
F ⋅Δ t
Images: OpenStax, College Physics. OpenStax CNX. April 5, 2017

5
Elastic and Inelastic Collisions
Stefan Bracher