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A particle is projected from the origin at $\vec{u} = 10 \hat{i} m / s$ . It moves in the xy plane with acceleration $\vec{a} = (3 \hat{j} - 2 \hat{i}) m / s^{2}$ when velocity of the particle is parallel to y-axis, its speed is

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detailed solution

Correct option is A

After time t, velocity is given by V→=u→+a→t=10i^+3j^−2i^t=10−2ti^+3tj^ m/swhen V→ is parallel to y-axis, 10−2t=0⇒t=5 second.∴ V→=3×5 m/s=15 m/s

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A particle is projected from the origin at u→=10i^ m/s. It moves in the xy plane with acceleration a→=3j^−2i^m/s2 when velocity of the particle is parallel to y-axis, its speed is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

A particle is projected from the origin at $\vec{u} = 10 \hat{i} m / s$ . It moves in the xy plane with acceleration $\vec{a} = (3 \hat{j} - 2 \hat{i}) m / s^{2}$ when velocity of the particle is parallel to y-axis, its speed is