The vector v has initial point P(1, 0) and terminal point Q that is on the y-axis and above the initial point. Find the coordinates of terminal point Q such that the magnitude of the vector v is 65 .

Respuesta :

Answer:

The terminal point is Q(0,4)

Step-by-step explanation:

We are given the following in the question:

Initial point of vector, P(1,0)

The terminal point Q lies on the y-axis, thus Q have coordinates of the form:

[tex]Q(0,y)[/tex]

The magnitude of the vector is [tex]\sqrt{65}[/tex]

Magnitude is given by:

[tex]v = \sqrt{(x_2-x_2)^2+(y_2-y_1)^2}\\\sqrt{65}=\sqrt{(0-1)^2+(y-0)^2}\\\sqrt{65}=\sqrt{1+y^2}\\65 = 1+y^2\\y^2 = 64\\y = \pm 8[/tex]

But since the terminal point is above the initial point, thus,

[tex]y > 0\\\Rightarrow y = 4[/tex]

Thus, the terminal point is Q(0,4)