(Solved): a) Explain the meaning of the word "balancing" as used in reciprocating and rotary machinery b) Wha ...

a) Explain the meaning of the word "balancing" as used in reciprocating and rotary machinery b) What are any three probable causes of unbalanced forces in rotating and reciprocating machinery? c) Four masses A, B, C, and D are attached to a shaft and revolve in the same plane. The masses are \( 200 \mathrm{~kg}, 300 \mathrm{~kg}, 240 \mathrm{~kg} \), and \( 360 \mathrm{~kg} \) respectively and their radii of rotations are \( 200 \mathrm{~mm}, 150 \mathrm{~mm}, 250 \mathrm{~mm} \), and \( 300 \mathrm{~mm} \). The angles between the successive masses are \( 45^{\circ}, 75^{\circ} \) and \( 135^{\circ} \). Using analytical method, find the magnitude and position of the balancing mass at a radius of \( 200 \mathrm{~mm} \) (10 marks) d) A single cylinder machine has a mass of \( 0.5 \mathrm{~kg} \), a connecting rod 120 \( \mathrm{mm} \) long and a crank radius of \( 50 \mathrm{~mm} \) when the speed of rotation is 3000 rpm. Determine: