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Macleef
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[SOLVED] Geometric Vectors
Find the magnitude and the direction (to the nearest degree) of the resultant of each of the following systems of forces.
a. forces of 3 N and 8 N acting at an angle of 60º to each other - use geometric vectors to solve this problem
Answer: 9.8 N, 15º to 8N
The cosine and sine laws.
r = a^2 + b^2 - 2(a)(b)cosr
sinθ/a = sinθ/b = sinθ/r
I tried using the sine law first, but I can't retrieve the angle to find the right resultant using the cosine law.
Homework Statement
Find the magnitude and the direction (to the nearest degree) of the resultant of each of the following systems of forces.
a. forces of 3 N and 8 N acting at an angle of 60º to each other - use geometric vectors to solve this problem
Answer: 9.8 N, 15º to 8N
Homework Equations
The cosine and sine laws.
r = a^2 + b^2 - 2(a)(b)cosr
sinθ/a = sinθ/b = sinθ/r
The Attempt at a Solution
I tried using the sine law first, but I can't retrieve the angle to find the right resultant using the cosine law.
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