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Physics · MOTION IN A PLANE
हिन्दीA particle is projected from the ground with a velocity \( u \) at an angle \( \theta \) with the horizontal. The magnitude of the change in velocity of the particle between the instant of projection and the instant it reaches maximum height is:
Correct answer · Option 4
\( u\sin\theta \)
Explanation
Initial velocity \( \mathbf{v}_i = u\cos\theta \hat{i} + u\sin\theta \hat{j} \). Velocity at top \( \mathbf{v}_f = u\cos\theta \hat{i} \). Change in velocity \( \Delta\mathbf{v} = \mathbf{v}_f - \mathbf{v}_i = -u\sin\theta \hat{j} \). Magnitude \( |\Delta\mathbf{v}| = u\sin\theta \).
