Grade 11Mechanics

The resultant of two forces acting at an angle of 120° is 10 kg wt and is perpendicular to one of the forces.what is the magnitude of that force?

Aranya Sharma

7 Years agoGrade 11

3 Answers

Arun

7 Years ago

Dear student

tan 30 = 1/ sqrt(3) = x/10

hence x = 10/sqrt(3)

Hope it helps

Regards

Arun (askIITians forum expert)

Saurabh Koranglekar

7 Years ago

Dear student

Break the forces in components

F1 be on +ve axis and f2 be in 2nd quadrant, fr be perpendicular to f1

F1= f2 cos 120 = -f2/2

F2 sin120 = fr

Now f2 = 20/sqrt(3)

F1= 10/sqrt(3)

Regards

Khimraj

7 Years ago

Answer is 5
Bcs if theta = 120 degree then
Resultant=A+B
Where
A→=B→=a
a+a=10
a=5

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The resultant of two forces acting at an angle of 120° is 10 kg wt and is perpendicular to one of the forces.what is the magnitude of that force?

Aranya Sharma

3 Answers

Arun

Saurabh Koranglekar

Khimraj

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