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

A. 141 N
B. 200 N
C. 400 N
D. It depends on the bike’s shape and area
E. Other (specify)


C. 400 N

Physics & Space Science

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Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A 50. cm diameter wheel is rotating initially at 2.0 revolutions per second. It slows down uniformly and comes to rest in 15 seconds

(a) What was its angular acceleration? (b) Through how many revolutions did it turn in those 15 s?

Physics & Space Science