CBSE Class 11-science Answered
The position of a particle at any instant is given by r = 5t² i + 50t j. At what instant the velocity vector will make an angle 45° with X-axis.
Asked by debjit_dm | 15 Apr, 2020, 10:13: PM
Expert Answer
Position vector is given by
.......................(1)
velocity vector is obtained by differentiating eqn.(1)
if velocity vector makes angle 45o with x-axis means, x-component of velocity and y-component velocity are equal
hence, 10 t = 50 or t = 5 s
Answered by Thiyagarajan K | 15 Apr, 2020, 11:34: PM
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