plz help me with my work ASAP
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Answer:
2v1.v2/(v1+v2)
Explanation:
Average speed = total distance / total time
Let half distance = d , then total is 2d. Time taken to cover first half is T1 and T2 is the time for second half.
V1 = d/T1
T1 = d/V1
similarly T2 = d/V2
Speed Average = (d + d)/(d/v1 + d/v2)
= 2d/{(dv2+dv1)/(v1 . v2)}
final answer = 2v1.v2 /(v2+v1)
Average velocity is same as nothing is mentioned about the direction so the assumed direction is just straight line.
jay1001:
If you have any doubt pls ask in the comment section will try to clear it.
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