Suppose you want to ride your mountain

bike up a steep hill. Two paths lead from the base to the top, one twice as long as the other. Compared to the average force you would exert if you took the short path, the average force you exert along the longer path is

BLUE: four times as small.

PINK: three times as small.

YELLOW: half as small.

PURPLE: the same.

GREEN: undetermined–it depends on the time taken.