I guess it’s d) isobaric mate correct me if I am wrong :D
Answer:
due to the inertia of motion, the fan continues to move for some time even after switching it off.
D because friction will slow it down going up hills (for safety reasons) and you go really fast going down.
<span>We use m/s for the velocity, and m2/(V·s) for the </span><span>mobility.</span>
