Question

what is the length of the x - component of the vector shown below? a. 5.5 b. 7.1 c. 8.6 d. 30.0

Explanation:

Step1: Use cosine formula

$x - component = |\vec{v}|\cos\theta$

Step2: Substitute values

$9\times\cos(38^{\circ})\approx7.1$

Answer:

B. 7.1