John traveled East at 10 m/s for ten

seconds. He realized he had gone too

far and made a U-turn. He traveled

West at 5 m/s for six seconds. Calculate

John's displacement.

a. 30 m

b. 70 m

C. 100 m

d. 130 m

Option D

130 m

Explanation:

From the concept of speed, distance=speed*time

When traveling East, displacement=10*10=100 m (since he takes 10 seconds while traveling at a speed of 10 m/s)

When traveling West, displacement=5*6=30 m (since John takes 6 seconds to travel at a speed of 5 m/s)

Total displacement=Displacement East + Displacement West=100+30=130 m