Grade 12th passMechanics

the magnitude of two forces is such that when acting at right angles produces a resultant force of √20 and when acting at 60° produces a resultent of √28 . find out the nagnitude of two forces .

Varun srivastava

8 Years agoGrade 12th pass

3 Answers

Basma

8 Years ago

Let R be the resultant . R=root of A^2+B^2 +2ABcosx

20=A^2+B^2. When at angle 60,R=root of A^2+B^2+2ABcos60. 28=A^2+B^2+2AB/2

28=20+AB. AB=8

A^2+64/A^2=20

After calculations A=2,B=4

Devika

7 Years ago

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the magnitude of two forces is such that when acting at right angles produces a resultant force of √20 and when acting at 60° produces a resultent of √28 . find out the nagnitude of two forces .

Varun srivastava

3 Answers

Basma

Devika

Atanu Maji

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