Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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I'm sorry, I forgot about the F1 - F2 equation, but it really is no different than what I stated above. My last post was F1 + F2. The only difference in that calculation and the subtraction one is that you must use the negative components of F2. All of the summation and equation still hold true.
You can break up as many vectors as you want to add or subtract and use the Pythagorean theorem.
Ricky's method is perfectly correct. A quicker, but harder, alternative is to make the two known forces into two sides of a triangle and then use trigonometric formulae to find the length and angle of the third side.
First, we need to make these vectors.
I'll write the directions and magnitudes again.......
You gave a direction, but not a magnitude. You need both.