Help me with magnitude and direction?

  • Thread starter mikeyp
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  • #1
mikeyp
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Homework Statement




Vector a has a magnitude of 4.3 m and is directed east. Vector b has a magnitude of 3.9 m and is directed 35° west of north. What are (a) the magnitude and (b) the direction (from east) of a + b ? What are (c) the magnitude and (d) the direction (from east) of b - a? Round your angles to the nearest degree.


Homework Equations


socahtoa? a^2+b^2=c^2
sin(35)*3.9/4.3


The Attempt at a Solution


sin(35)*3.9/4.3
 

Answers and Replies

  • #2
berkeman
Mentor
62,893
13,782

Homework Statement




Vector a has a magnitude of 4.3 m and is directed east. Vector b has a magnitude of 3.9 m and is directed 35° west of north. What are (a) the magnitude and (b) the direction (from east) of a + b ? What are (c) the magnitude and (d) the direction (from east) of b - a? Round your angles to the nearest degree.


Homework Equations


socahtoa? a^2+b^2=c^2
sin(35)*3.9/4.3


The Attempt at a Solution


sin(35)*3.9/4.3

Welcome to the PF,

On vector questions like this, it is helpful to draw a diagram showing the vectors and their addition/subtraction. Can you draw the diagrams and scan/upload them?
 

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