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JEE Physics Practice Question

A particle of mass $m$ is moving in the $x y$-plane such that its velocity at a point $(x, y)$ is given as $\overrightarrow{\mathrm{v}}=\alpha(y \hat{x}+2 x \hat{y})$, where $\alpha$ is a non-zero constant. What is the force $\vec{F}$ acting on the particle?

  1. A.$\vec{F}=2 m \alpha^{2}(x \hat{x}+y \hat{y})$
  2. B.$\vec{F}=m \alpha^{2}(y \hat{x}+2 x \hat{y})$
  3. C.$\vec{F}=2 m \alpha^{2}(y \hat{x}+x \hat{y})$
  4. D.$\vec{F}=m \alpha^{2}(x \hat{x}+2 y \hat{y})$

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