X2 trial prep (NE20AP)

The Argand diagram shows the rectangle OABC where OC = 2OA.

Vertex A corresponds to the complex number w.

Which of the following complex numbers corresponds to vertex C?

If x, y and z are any real numbers and x > y, which of the following statements must be true?

A particle moves in simple harmonic motion along the x-axis about the origin. Initially, the particle is at its extreme positive position. The amplitude of the motion is 12 metres and the particle returns to its initial position every 3 seconds.

What is the equation for the position of the particle at time t seconds?

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•  constant acceleration and constant velocity

• constant acceleration and decreasing velocity

• constant acceleration and increasing velocity

• increasing acceleration and increasing velocity