PLEASE HELP Projectile Motion: Two-dimensional Kinematics

[Npila1]

PLEASE HELP! Projectile Motion: Two-dimensional Kinematics

The horizontal and vertical components of velocity...
A) have no relationship to each other.
B) are related to the overall velocity, but can be treated separately.
C) are related to the overall velocity.

I know it's either A or B but the wording is confusing me! PLEASE HELP! It is an online quiz

 

[edziura]

Given the horizontal and vertical components of velocity, is there a way to calculate the magnitude of the overall velocity? Draw a velocity triangle.

If there is, then the answer must be b.

 

[Npila1]

Thanks for replying so fast!
There are no values given, it is just a theoretical question...I know that to calculate each component you need to have the value of the overall velocity - is that right? So, does that mean they are "related" to the overall velocity? I'm just not sure what he means...

 

[edziura]

"I know that to calculate each component you need to have the value of the overall velocity - is that right?"

Yes.

"So, does that mean they are "related" to the overall velocity?"

Yes.

 

[jdlinke]

Consider an x-y plane. If you move a particle directly to the right, it doesn't influence that particle's motion upward or downward (y) at all. Similarly, if you move the particle directly upward, it doesn't influence it in the left or right directions (x). But either of these will influence the overall velocity, which is made up of both x and y velocity components.

v = \sqrt{v_{x}^{2} + v_{y}^{2}}