Wednesday

July 23, 2014

July 23, 2014

Posted by **anonymous** on Tuesday, February 15, 2011 at 11:46pm.

- physics -
**drwls**, Wednesday, February 16, 2011 at 12:52amIf the average must be 21,

(V1 + V2)/2 = 21

V1 + V2 = 42

V2 = 42 - V1 = 42 - 6 = ___ mph

V2 is the final velocity required

V1 is the initial velocity

**Related Questions**

Algebra - If you drive for 2 hours at 80 mph, how fast must you drive during the...

physics - On a drive from your home to town, you wish to average 52 mph. The ...

Physics - Top fuel drag racer can reach the maximum speed of 304 mph at the end ...

math - A race car driver starts along a 50-mile race course traveling at an ...

Calculus - A 727 jet needs to attain a speed of 200 mph to take off. If it can ...

physics - On a drive from your home to town, you wish to average 39.6 mph. The ...

Algebra - Rachel and Lindsay are in third place in a race. Due to a time penalty...

physic - In order to qualify for the finals in an race, a runner must achieve an...

physics - a boy walks to his school at a distance of 6km with constant speed of ...

physics - a boy walks to his school at a distance of 6km with constant speed of ...