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a) The fuel storage yard is separated from the main plant by a swing bridge (swinging in a horizontal plane). The motor driving the bridge requires replacement necessitating an analysis of torque requirements. The bridge must swing through an angle of 90o in 120s. The bridge accelerates uniformly for 40s then moves at a constant velocity, decelerating uniformly to rest in the final 20s.The rotating components of the bridge have an equivalent moment of inertia of 103 kgm2 and feel a constant resisting torque of 300Nm. Find the torque required for the three stages of motion.
b) A problem has arisen in the goods yard where a large container is required to be pulled along a makeshift horizontal slipway by a rope wound around a winding drum. See below. The container has a mass of 1.5 tonne and is pulled along the horizontal slipway at an acceleration of 0.9m/s2. The resistance to motion of the container is equivalent to a co-efficient of friction of 0.6. The winding drum has a mass of 0.5tonne, outside diameter of 1m and radius of gyration of 0.3m. The drum has a resistance couple of 200Nm acting on it. Find the torque required by the motor of the winding drum.
In the assessment of a buffers performance, a railway carriage of mass 6 tonne is allowed to roll freely down an incline of 1 in 20 (sine) for a distance of 50m into a horizontal yard. At the end of the yard it is brought to rest by a pair of parallel buffer springs. The stiffness of each spring is 30kNim and the initial resisting force in each spring before impact is 4.5kN. Using an energy method calculate the maximum compression of the springs.
Coal is discharged from the tailgate of a dump truck with an initial velocity vA = 2 m/s A 50°. Determine the radius of curvature of the trajectory described by the coal.
a raindrop of mass 3.36 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance.
Steady State Thermal analysis can be use to simulate and obtain results to support the design optimization / objectives
Using MATLAB Simulink, set up the negative feedback system of and find the value of the gain
a gasoline engine takes air in at 290k 90kpa and then compresses it. the combustion adds 1000 kjkg of heat to the air
a free piston-cylinder system initially contains 8 kg of saturated liquid water at 275 kpa initial state. the water in
the steel shaft gst 10.8times103 ksi is made from two segments ac has a diameter of 0.5 in l5in and cdb has a diameter
A large rocket engine delivers hydrogen at 1500°C and 3 MPa to a nozzle with an exit pressure equal to the ambient pressure of 54 kPa. If the thrust of the rocket is 2 MN what is the exit velocity and mass flow rate of hydrogen? (use k = 1.41 and ..
the density if water at sixty degrees fahrenheit and atmospheric pressure is sixty-two point four lbmft3. what is the
For each of the following pairs of polymers, do the following: (1) state whether or not it is possible to determine whether one poly- mer is more likely to crystallize than the other; (2) if it is possible, note which is the more likely and then ..
Determine the maximum angle () for which the wheelbarrow will not slip. (b) Repeat if the wheelbarrow faces uphill. Neglect all friction associated with the front wheel B.
Show that the total true strain is the sum of the true strains in each step, that is the true strains are additive. Show that using engineering strains, the strain for each step cannot be added to obtain the total strain.
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