a car begin to move from rest for the first half of path it moves with constant acceleration. then it moves with the attained velocity of 18m/s for the rest path.What is its average speed for the entire path ?

Question

Niraj Bishnoi · Answer

Is the answer ~15.36m/s or 10.26m/s? If yes then here’s how I did- =>v 2 =v 0 2 +as (2xs/2=s) =>v 2 =as …................................(A) Now v becomes v 0 for the second case, =>18 2 =v 2 +as =>324=2as =>as=162 =>v 2 =162 v=12.72 Now average speed, v (conjugate)= u+v/2=30.72/2=15.36 I don’t remember very well, but the average speed could also be=u+v + v f /3=30.72/3=10.26m/s

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a car begin to move from rest for the first half of path it moves with constant acceleration. then it moves with the attained velocity of 18m/s for the rest path.What is its average speed for the entire path ?

a car begin to move from rest for the first half of path it moves with constant acceleration. then it moves with the attained velocity of 18m/s for the rest path.What is its average speed for the entire path ?

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