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A particle is moving along east with an initial velocity of 10 m/s and acceleration is 3 m/s² along the west. What its velocity after 5 sec is
Option: 1
5 m/s along east

Option: 2
25 m/s along east

Option: 3
25 m/s along west

Option: 4
5 m/s along west

Answers (1)

best_answer

$\\*\vec{V}=\vec{u}+\vec{a}t\\*\\*\vec{u}=10\, m/s\; along\; east=10\hat{i}(m/s)\\*\\*\vec{a}=3\, m/s^{2}\; along\; west=-3\hat{i}(m/s^{2})\\*\\*\vec{V}=10\hat{i}-3\times 5\hat{i}=-5\hat{i}\\*\\*\vec{V}=-5\hat{i}$

Posted by

Pankaj Sanodiya

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