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3 Mechanics

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Question 81

A particle of mass m m\,m kg is in equilibrium. A force (−7i+73j)(-7\mathbf{i}+7\sqrt3\mathbf{j})(−7i+73​j) N acts on it, together with a horizontal force FiF\mathbf{i}Fi N and its weight. The unit vector j\mathbf{j}j is vertically upwards. Use g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2.

a.

Find FFF.

[2]
b.

Find mmm.

[2]
c.

State the resultant force acting on the particle.

[1]
Markscheme

3 Mechanics Questions

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

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