Posted by **Sarah** on Sunday, October 14, 2012 at 7:59pm.

Aiyana drives for 100 s at a rate of 20m/s, then turns around and drives for another 200 s at a rate of 30m/s and completes the rest of her journey at a rate of 90m/s for 100 s. what is her average velocity?

- Physics -
**drwls**, Sunday, October 14, 2012 at 11:26pm
Divide her net distance travelled by 400 seconds.

The answer will depend upon her direction when traveling at 90 m/s. this is not clearly stated.

- Physics -
**Elena**, Monday, October 15, 2012 at 12:44pm
Displacement = (-20)•100 +30•200+90•100= =13000 m.

Ave velocity = displacement/time taken =

= 13000/400 =32.5 m/s.

## Answer this Question

## Related Questions

- math - A computer store sold a total of 300 items last month. The store sold six...
- chemistry - What is the rate of disappearance of dinitrogen pentoxide between ...
- Physics - A forklift driver at the Acme W&W warehouse drives a forklift from ...
- chemistry - Given this data in a study on how the rate of a reaction was ...
- Chemistry(Thank you for helping) - 1) Given this data in a study on how the rate...
- Physics - Consider a map oriented so that the x-axis runs east-west (with east ...
- physics - A car drives 100 meters at 30 degrees north of east, stops, turns to ...
- algebra - Melissa drives her car 200 kilometers in 2.5 hours. How far can she ...
- ap chem - find a rate constant of rate= (x)^2(y) calculate rate for exp. 4 ...
- Chemistry - S2O82-(aq) + 2I-(aq) ----------> 2SO42-(aq) + I2(aq) (I) Rate = k...