An object moves 20m east in 30s and then returns to its starting point taking an additional 50s. if west is chosen as the positive direction, what is the average speed of the object? a. -0.5m/s
b. 0.5 m/s

b) 0.5 m/s

Explanation:

let V be the averare speed of the object.

the average speed is given by:

V = total distance / total time

   = (20+20)/(30+50)

   = 0.5 m/s

Therefore, the average speed of the object is 0.5 m/s.

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