Find Unit Vector of A with Mag. 9m - Homework Solutions

[dtrain121]

Homework Statement

Vector A has a magnitude of 9m. find the angles and the vector A

Homework Equations

u-hat equals the vector u divided by its length
cos alpha=Ax divided by A
cos Beta=Ay divided by A
cos gamma=Az divided by A

The Attempt at a Solution

i do not know where to begin because 9 is the only number given, help please

 

[kuruman]

Hi dtrain121, welcome to PF. Is the magnitude all that is given? No diagram, no components? What angles are you supposed to find?

 

[dtrain121]

yes that is all that is given. I am stuck, i do not think you can break it into components, the angles in the x, y, and z axes.

 

[kuruman]

If you don't have the axes, then you cannot do the problem without more information. A vector has magnitude and direction. If you are just given its magnitude, then you cannot describe its direction.

 

[dtrain121]

it is in all three axes

 

[kuruman]

it is in all three axes

I don't understand what you mean. What is in all three axes?

 

[berkeman]

Homework Statement

Vector A has a magnitude of 9m. find the angles and the vector A

Homework Equations

u-hat equals the vector u divided by its length
cos alpha=Ax divided by A
cos Beta=Ay divided by A
cos gamma=Az divided by A

The Attempt at a Solution

i do not know where to begin because 9 is the only number given, help please

As kuruman says, there is not enough information to solve the problem. Can you scan the original question and post it here as an attachment? There must be a diagram that shows a vector arrow or something.