First slide

Motion in a plane

Question

A particle has an initial velocity $3 \hat{i} + 4 \hat{j}$ and an acceleration of $0.4 \hat{i} + 0.3 \hat{j}$ . Its speed after 10 sec is

Moderate

Solution

$\bar v = \bar u + \bar a\,t$

$\Rightarrow \bar v = \left( {3\hat i + 4\hat j} \right) + \left( {0.4\hat i + 0.3\hat j} \right)10$

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