Answer:
A
Explanation:
The answer would be A because when feet push down on anything, the force will push down the skateboard
The answer is:
V = d/t d = 86 km t = 1.3 hrs
V = 86 km/ 1.3 hrs
V = 66.15 km/ hrs
I hope this helps!!

If the separation between the charges is increased then the magnitude of the force will increase in fact how the distance is being used in that formula.
Jill is the input, as she creates the force. The wrench is the output because it gives the force to the finish peace of the chain.