Answer:
D I think I might be wrong its been a while scense I did something like that
Distance, since distance represents how far something has travelled, which would be in our case 2.5m.
Answer:
Fc = 19.2 N
Explanation:
In this case, the force of the Honda over the rock, is a centripetal force. Then, you have:

m: mass of the rock = 600g = 0.6 kg
v: tangential velocity of the Honda = 4m/s
r: radius of the Honda = 50cm = 0.5m
You replace the values of m, r and v in the equation for Fc:

hence, the force has a magnitude of 19.2 N
If the rock would have more mass the centripetal force would be higher
Friction occurs when the surfaces and heat of two surfaces grind against each other.
I think these are the answers