SOLUTION: A bicyclist starts at rest. She starts to pedal, and after 8 seconds she is traveling forward at 4 miles/second. What is her acceleration, including direction?

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Question 77880: A bicyclist starts at rest. She starts to pedal, and after 8 seconds she is traveling forward at 4 miles/second. What is her acceleration, including direction?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
WOW!!! is this a rocket bike? 4mi/sec=14400 mph

assuming uniform acceleration, the acceleration equals the change in velocity divided by the change in time

so (4 mi/sec)/8 sec =.5 mi/sec/sec (sometimes written as .5 mi/sec^2) in the forward direction

as an aside ... if the bike and the rider weigh 150 lbs together, it takes 12375 lb of thrust to accomplish this