Asked by sara
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?
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
Answered by
bobpursley
b.
c.
a and d are nor revealing to determine elasticity.
c.
a and d are nor revealing to determine elasticity.
Answered by
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?
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?
Answered by
sara
I thought you just do 7(20)+(5)10
Answered by
bobpursley
If it is in three orthagonal dimensions, you have to
sqrt((140^2)+50^2 + 0^2)
sqrt((140^2)+50^2 + 0^2)
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