Engineering science
A lift cage in a mining operation has a mass of 1000kg when empty. When a fully laden with a mass of 700kg It is lowered with uniform acceleration such that after 200m its velocity is 25m/s.
By constructing free body diagrams and using D’Alembert’s principle determine:
(a) the tension in the cable of the lift (b) the reaction force exerted by the load in the lift.
(a) A length of brass piping is 30 m long at a temperature of 18°C. When hot water flows through it the temperature of the pipe rises to 70°C. Determine the length of the hot pipe if the coefficient of linear expansion for brass is 18 x 10-6
(b) If a steel shaft of diameter SO mm is subjected to cooling within the steel of 80 °C, determine the diameter of hole that the shaft can be inserted into. Take the coefficient of linear expansion of steel to be 15 x 10-6 K-1.
Carry out research to compare how changes in the thermal efficiency of a given system can affect its performance. Remember to fully reference any sources used using Harvard referencing,
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