A particle has initial velocity (2hat i +3hat j ) and constant acceleration (0.3hat i +0.2hat j ). Its speed after 10 s is:

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NEET Physics QUESTION #7341

Question 1

A particle has initial velocity $(2\hat{i}+3\hat{j})$ and constant acceleration $(0.3\hat{i}+0.2\hat{j})$. Its speed after 10 s is:

Correct Answer Explanation

$\vec{v} = (2+0.3\times10)\hat{i} + (3+0.2\times10)\hat{j} = 5\hat{i}+5\hat{j}$

Speed $= \sqrt{25+25} = \sqrt{50} = \mathbf{5\sqrt{2}}$ units