Question

find the tension in the string and reaction at point B. weight of roller 200N
please answer I need it fast
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Answer 1

Answer:

100√3 N

Explanation:

Since the roller is at rest, we can say that all the forces acting on it balance each other out.

All the forces acting on the roller:

Tension force : T

Gravitational force 200N

Normal Forces (not necessary here as they cancel each other out)

Now;

Taking component of gravity along Tension : 200.Cos30° = 100√3

∵Tension and the component of gravity cancel each other out;

T = 100√3

NOTE:

We do not take components of tension force along forces acting on a body, rather we take the component of force which creates tension, and the component is taken in the direction of tension force or perpendicular to it in some cases.