Lecture 12 Flashcards
What is Newtons 1st law of motion
What does it refer to
Inertia
An object will either remain at rest or continue to move at a constant velocity unless acted upon by a force
Sum of forces are balance
Static equilibrium under newtons first law (linear motion)
Sum of F = 0
Linear velocities = 0
The body is not moving
Dynamic equilibrium under newtons first law (linear motion)
Sum of F = 0
Linear velocities cannot equal 0 but are constant
The body is moving at constant pace
Horizontal motions of a projectile involve
Vertical (gravity)
Horizontal = constant
What is inertia
What is it proportional to
The resistance of any physical object to any change in ites state of motion
Mass
Density =
Mass/volume
Linear momentum equation
P = mv
What is linear momentum
The product of mass and linear velocity
Quantifying the motion and inertia of an object together in one measure
Conservation of linear momentum happens when
Sum of F = 0
Dynamic equilibrium:
Constant V
Constant M
Conservation of linear momentum with no external forces on two objects would look like
Pi = Pf
Sum of (mv) = Sum of (mv)
What is an elastic collision
The object bounce apart after collision
Magnitude of relative velocity stays the same
What is an inelastic collision
The objects stick together after collision
When there is elastic collisions, what is conserved
Energy and momentum
What happens to Partially inelastic objects
Do not stick together but lose some energy due to deformation etc
What happens to Inelastic objects
Energy is lost via heat etc
Momentum is conserved
