Physics 9702 · AS & A Level · Scalars and vectors

Scalars and vectors — practice question

A vector quantity $V$ is broken down into two perpendicular components $X$ and $Y$. The angle between $V$ and component $X$ is $\theta$. The angle between component $X$ and the vector $V$ is then increased from $0^{\circ}$ to $90^{\circ}$. In this situation, how do the magnitudes of $X$ and $Y$ vary as the angle $\theta$ is increased?

  • AX increase, Y increase
  • BX increase, Y decrease
  • CX decrease, Y increase
  • DX decrease, Y decrease

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