An ant crawls in a straight line at a constant speed of 0.24 m/s for a distance of 3.0 m,beginning in the corner of a square classroom.It then turns exactly 90 degrees to the right,and proceeds an additional 4.0 m with a constant speed of 0.44 m/s,reaching the other corner of the same wall from which it began.What was the average speed for the full trip from corner to corner?
A) 0.34 m/s
B) 0.30 m/s
C) 0.21 m/s
D) 0.23 m/s
E) 0.32 m/s

Question

Quizplus · Accepted Answer

The total distance traveled is 3.0 m + 4.0 m = 7.0 m. The time for the first segment is 3.0 m / 0.24 m/s = 12.5 s, and for the second segment is 4.0 m / 0.44 m/s = 9.09 s. The total time is 12.5 s + 9.09 s = 21.59 s. The average speed is total distance / total time = 7.0 m / 21.59 s ≈ 0.32 m/s.

An Ant Crawls in a Straight Line at a Constant