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what happens if two people standing on a skate board push off of each other?

if two people stand on a skate board and then push off of each other what will happen to them? will they fall? will they go back?

yes,...i think you want an analysis of the fores acting?
ok
s'pose there are two girls on the skate boards...A n B...
B pushes A with some force....then..according to newtons 3rd law of motion(equal n opposite action reaction)...the same force A will apply on B...
now comes the next part...how will both these things react to this?
it depends upon the mass of the two bodies.....the same force is being applied on both the girls....acording to F=ma...the same force will produce a different acceleration in the two bodies(because they have different masses)
so,if A is heavier...she will move back with a low acceleration and if B is heavier then she will....
because they are on rollers....friction between their foot ans the floor will be very less....friction tends to cancell out the force acting to initiate acceleration which brings about motion....

so thats what it is!
(its a practical aspect that they will fall...according to physics---they will move back)

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