A car travels 8 m towards North with the speed of 2 m/s and then 6 m towards South with the speed of
3 m/s. Find the magnitude of average velocity.
Answers
Answer:
0.3m/sec
Explanation:
Average velocity is mentioned in the form of ratio of the total displacement to the total time.
(total displacement : total time)
If we consider a graphical representation, North is a positive direction and South is a negative direction.
Car moves +8m (towards north) with a speed of 2m/s and the time taken is = distance / speed = 8/2 = 4 secs
Car moves -6m (towards south) with a speed of 3m/s and the time taken is = distance/speed = 6/3 = 2 secs
(we do not use negative sign because it is used only for the value of displacement)
Now,
Total time = 4 secs + 2 secs
= 6 secs
Total displacement = 8 m - 6 m
= 2 m
We need the average velocity
Avg. Velocity = total displacement / total time
= 2/6
= 1/3
= 0.3m/sec