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What scalar quantity is obtained from the magnitude of a velocity vector?
A
Acceleration and displacement may point in different directions.
B
For v=(vxvy)\mathbf{v}=\begin{pmatrix}v_x\\v_y\end{pmatrix}v=(vxvy), the speed is ∣v∣=vx2+vy2\boxed{|\mathbf{v}|=\sqrt{v_x^2+v_y^2}}∣v∣=vx2+vy2.
C
The object's speed.
D
Its magnitude and direction remain unchanged.
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3.2.5 Constant acceleration in two dimensions (A-level only) Flashcards
20 flashcards on OCR A Level Maths 3.2.5 Constant acceleration in two dimensions (A-level only): the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.