Question

When you increase your velocity on a skateboard, it is harder to stop. Which is this an example of?
momentum


inertia


balanced force

Answer 1

-Momentum

If you increase your velocity, create more momentum. Inertia is one of the factors to cause the skateboard to stop and balanced force doesn't even apply to increasing the velocity of the skateboard.

Hope this helps!

Answer 2

I am going to have to say momentum! 
Hope this helps!