Posted by **Nabiha** on Friday, September 11, 2009 at 4:52pm.

A bike racer is riding his new bike at Silverstone. The track is 4km long.

a) What is his average speed in m/s if he does a lap in 2 minutes?

b) What is his velocity after one lap?

- physics -
**bobpursley**, Friday, September 11, 2009 at 5:03pm
avg speed= distance/time change km to meters, min to seconds.

Velocity is (final position-initial position)/time. Because his final position and intial position are the same, his average velocity is zero.

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