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4 cards from this section. Quick, good the night before a test.
Define what a resultant vector is.
Think about how you combine forces.
What are the components of a vector?
How do we break a vector into parts?
The analytical method of vector addition is more precise than the graphical method.
Think about accuracy.
What does the Law of Cosines help to find?
Consider what problems it solves in triangles.
A hiker travels 5 km north, then 12 km east. What is the resultant distance and direction from the starting point?
Consider the triangle formed by the total paths taken.
Two vectors A and B have magnitudes of 30 units and 40 units, forming a 45° angle. Calculate the resultant vector R's magnitude and its angle.
Use the Law of Cosines to find the magnitude first.
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