Question

two forces 100 N and 300 N are acting at an angle of 60 at same point. Find the magnitude of resultant vector ​

Answer 1

Answer:

The resultant force, R will lie along the longer diagonal of the parallelogram whose sides are the given forces.

Invoking the cosine rule

R2=1002+602–2×100×60cos120∘

From which it is easy to show that R=140N

We have to give the direction of R . Let us find the angle, θ in relation to the force of 60N . We use the sine rule.

sin120∘R=sinθ100

θ=sin−1(100sin120∘)140

θ=38.2∘ to the 60N force.

Explanation:

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