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.