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3 Mechanics

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Question 78

A uniform horizontal rod AB AB\,AB has length 6 m and weight 120 N. It is hinged at AAA. A load of weight 80 N is attached 4 m from AAA. The rod is held in equilibrium by a cable attached at B B\,B which makes an angle of 30∘ 30^\circ\,30∘ above the rod and pulls upwards and towards AAA.

Figure for question 7

a.

Find the tension in the cable.

[3]
b.

Find the horizontal and vertical components of the force exerted by the hinge on the rod.

[3]
c.

Hence find the magnitude of the force exerted by the hinge on the rod.

[1]
Markscheme

3 Mechanics Questions

  1. A Level
  2. /Maths
  3. /3 Mechanics

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