Answer:
while wearing roller skates, if a person pushed against a wall as hard as he or she could, the wall is solid and grounded, and the person wearing roller skates would be pushed back with an equal amount of force, moving them away from the wall.
Explaination:
Because thats how it works, it pushes back with an equal amount of force, and because the wall is solid, it wont move, but the person pushing will be sent backwards.