A block of mass 15 kg is held at rest on a rough plane, inclined at an angle of 20° to the horizontal, by a rope making an angle of 60° to the plane. The magnitude of the tension in the rope is 855 N. Calculate the magnitude of the friction force, in newtons, to two significant figures. (Take the magnitude of the acceleration due to gravity, g, to be 9.8 m s^-2.) The magnitude of the friction force is N (to 2 s.f.).
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Step 1:** Identify the forces acting on the block: - Tension force (T) at an angle of 60 degrees to the plane - Weight of the block (mg) acting vertically downward - Normal force (N) acting perpendicular to the plane - Friction force (f) opposing the motion of the Show more…
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