A car travels from a point A to B point at constant speed of 50km/h .on return journey along the same paths, it travels at a constant speed 40km find it's distance travelled displacement and average speed
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Explanation:
v1= d/t1 d1 = d2
t1= d/v1 v1=50
t2=d/v2. V2=40
avg v. = total distance/total time
avg v.= 2d / (d/v1) + (d/v2)
= 2d × v1v2 /dv1 + dv2
= 2 × v1v2/v1 + v2
= 2×50×40 / 50 + 40
= 4000/9.
avg. speed =44.44
displacement = 0
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