Final answer:
Pushing against a wall while standing on a skateboard will result in you moving in the opposite direction, as per Newton's third law of motion. This movement is facilitated by the low friction between the skateboard and the ground.
Step-by-step explanation:
If you were standing on a skateboard and pushed the wall, you would start moving in the opposite direction due to Newton's third law of motion. This law states that for every action, there is an equal and opposite reaction. So, when you push the wall, the wall pushes back on you with an equal force, but in the opposite direction, causing you to travel backwards on the skateboard. The skateboard allows this movement to happen smoothly because it reduces friction between your feet and the ground, so the force from the wall is not wasted overcoming a lot of friction.
The harder you push against the wall, the stronger the wall will 'push' you back, and the faster you will accelerate away from the wall. This can be better understood using the concepts of force and momentum. The force exerted by your hands onto the wall is transferred to the skateboard through your body, thus propelling you forward.