Imagine That an External Force Of $100 \mathrm{~N}$ Must Be Applied to Keep a Bicycle and Rider Moving

Multiple Choice

Imagine that an external force of $100 \mathrm{~N}$ must be applied to keep a bicycle and rider moving at a constant speed of 12 $\mathrm{mi} / \mathrm{h}$ against opposing air drag. To double the bike's speed to $24 \mathrm{mi} / \mathrm{h}$ , we must increase the magnitude of the force exerted on the bike to

A) $141 \mathrm{~N}$
B) $200 \mathrm{~N}$
C) $400 \mathrm{~N}$
D) It depends on the bike's shape and area
E) Other (specify)