Sunday

December 21, 2014

December 21, 2014

Posted by **George** on Saturday, January 10, 2009 at 7:10pm.

Is the answer 3.7

Also for the last question regarding the donuts I used your method for part b and it said the answer is wrong. It want s the answer in meters.

- How far behind? -
**Damon**, Saturday, January 10, 2009 at 8:21pmNeed to know how far behind runner A is at 9 km

then figure time for leader to run the last km at 9 km /35 min rate

In that time A mus increase speed so that he covers 1 km plus the distance behind in that time

his average speed is then (1 + distance behind)/time for leader to finish

his final speed is then found from

average speed = (final + original)/2

then the constant acceleration is

a = (final speed - original speed)/time

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