Question

You know that a collision must be "elastic" if:

The momentum of the two-object system doesn't change
The sum of the final kinetic energies equals the sum of the initial kinetic energies
There is no change in the internal energies of the objects (thermal energy, vibrational energy, etc.)
The colliding objects stick together The colliding objects are stretchy or squishy
which are true?

Answers

bobpursley
b.
c.

a and d are nor revealing to determine elasticity.
sara
thanks,
can you help me with this one

What is the angular momentum A if A = <7, 5, 0> m and = <-20, 10, 0> kg·m/s?
sara
I thought you just do 7(20)+(5)10
bobpursley
If it is in three orthagonal dimensions, you have to

sqrt((140^2)+50^2 + 0^2)

Related Questions