A vector of magnitude is directed at (measured anticlockwise from the positive x-axis)

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A vector

\mathbf{P}

of magnitude

20\,\text{units}

is directed at

210^{\circ}

(measured anticlockwise from the positive x-axis). Which of the following correctly states the signs of its rectangular components

(P_x, P_y)

? (a)

(+,-)

(b)

(-,+)

(c)

(-,-)

(d)

(+,+)