Find the resultant of two forces equal to 50 N and 30 N acting at an angle of 60°.
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Answer: a = 50N
b = 30N
r = √ a² + b² + 2ab cos x
= √ 50²+30² + 2× 50×30× 1/2
= √2500+900+1500
= √ 4900
= 70N
Explanation:
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