Question

explain the variation in amplitude and frequency of the guitar

Answer 1

A plane has a velocity of $951\,\mathrm{km/h}$ in a direction 35 degrees west of north. What is the north component of the plane?

v – vector of velocity

The north component of a vector $\mathbf{v}$ is given as $|\mathbf{v}|$ cos$\theta$, where $\theta$ is the angle between $\mathbf{v}$ and north direction.

Therefore:

$$v_N = v \cos 35 = 951 * \cos 35 = 779 \frac{\mathrm{km}}{\mathrm{h}}$$

Answer: $779 \frac{\mathrm{km}}{\mathrm{h}}$