Describe what would happen if, while wearing rollerskates, you pushed as hard as you could against a wall. why does this happen?

Newtons 3rd law of motion can explain this. for every action there is an equal or opposite re-action. so if you push yourself you will roll backward, with the force of gravity acting on you, making you stop gradually. 

ahepatitis b

Ofator que afeta o bem estar e o fator mental