A bicyclist starts a timed race at 6.0 mi/h. In order to win,he must average 21 mi/h. Assuming constant acceleration from the start,how fast must he be traveling at the end of the race?
A)36 mi/h
B)30 mi/h
C)24 mi/h
D)42 mi/h

Question

A bicyclist starts a timed race at 6.0 mi/h.  In order to win,he must average 21 mi/h.  Assuming constant acceleration from the start,how fast must he be traveling at the end of the race?
A)36 mi/h
B)30 mi/h
C)24 mi/h
D)42 mi/h

Quizplus · Accepted Answer

To find the final speed required to average 21 mi/h, use the formula for average speed: (initial speed + final speed) / 2 = average speed. Solving for the final speed gives: (6 + final speed) / 2 = 21, leading to final speed = 36 mi/h.

A Bicyclist Starts a Timed Race at 6