Linear Momentum BEFOREAFTER
x y x y
Red (kg.m/s)
Blue (kg.m/s)
Total (kg.m/s)
Angular MomentumBEFOREAFTER
Kinetic Energy           BEFORE AFTER
Redd (joules)
Blue (joules)
Total (joules)
Linear Momentum BEFOREAFTER
x y x y
Red (kg.m/s)
Blue (kg.m/s)
Total (kg.m/s)
Angular MomentumBEFOREAFTER
             Kinetic Energy AFTER<
Translational Kinetic Energy BEFORE AFTER
Red (joules)
Blue (joules)
Total (joules)
Rotational Kinetic Energy AFTER
Red (joules)
Blue (joules)
Total (joules)
Linear Momentum BEFOREAFTER
x y x y
Red (kg.m/s)
Blue (kg.m/s)
Total (kg.m/s)
Kinetic Energy BEFORE AFTER
Red (joules)
Blue (joules)
Total (joules)
Linear Momentum BEFOREAFTER
x y x y
Red (kg.m/s)
Blue (kg.m/s)
Total (kg.m/s)
Kinetic Energy BEFORE AFTER
Red (joules)
Blue (joules)
Total (joules)

'CoM' means 'Center of Mass'.

m : mass (kg)

(a scalar quantity)

v : velocity (m/s)

(a vector quantity)

p : linear momentum (kg.m/s)

(a vector quantity)

K : kinetic energy (J)

(a scalar quantity)

# K=½mv²

The law of conservation of

momentum:

The total momentum of an isolated

system at a moment in time

is equal to

The total momentum of that same

isolated system at any other

moment in time.

Angular and rotational calculations:

...are calculated about the center of mass (which may

be moving)... which results in the angular momentum of

each mass being the same. Assume the masses are disks.

.

Collision words:

Elastic collision: No K lost during collision.

Inelastic collision: Some K lost during collision.

Perfectly inelastic collision: Maximum K lost during collision.

Masses that collide and stick together

have a perfectly inelastic collision.

'Elastic collision' means the same thing as

a 'perfectly elastic collision' (!)

'Perfectly inelastic collision' means the same

the same thing as a 'completely inelastic collision' (!)

Coefficient of restitution:

The relative speed before the collision

divided by

The relative speed after the collision.

There is no law of conservation of kinetic energy.

For right-angled triangles:

longest side²=shorter side² + the other shorter side²

sin θ  =side opposite to angle / longest side

cos θ=side adjacent to angle / longest side

tan θ  =side opposite to angle / side adjacent to angle

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# 2DCollisionSim... donate?

If you use and like this app, and would like to see improvements,

new apps developed, or to simply encourage me, providing more coffee

(black, no sugar) definitely helps. You can do that by sending a

coffee's worth to my PayPal account using the orange 'Donate' button

at the right of this screen.

Thank you! (from me, Martin Kirby)

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Move a velocity slider

Masses stick together

5=object

5=g

5=angle

5=angle