Question

Two forces whose magnitude are in the ratio of 3:5 act at an angle of 60° and have a resultant equal to 35 N. Find the magnitude of the forces.​

Answer 1

Answer:

Correct option is

C

15N,25N

Using cosine law and assuming the forces to be of magnitudes 3x and 5x,

c=a2+b2+2abcosθ

35=34x2+15x2

therefore x=35/7=5.

Forces are thus equal to 15 N and 25 N.

Explanation:

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