Question

A displacement vector, at an angle of 30° with y-axis has an x-component of 10 units. Then the magnitude of the vector is ______.

Options

• 5.0

• 10

• 11.5

• 20

Answer 1

A displacement vector, at an angle of 30° with y-axis has an x-component of 10 units. Then the magnitude of the vector is 20.

Explanation:

Let `vecR` be the given vector. X-component of the vector `vecR`.

= `|vecR| cos60^circ = 10`

`|vecR| = 10/(cos60^circ) = 20`