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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.
Suppose an object moves on a horizontal line. If the object starts from rest at the origin and it has an acceleration of 16t-t, Determine the total distance the object has moved when time is 2 seconds. Note the distance moved is not the position. For..
An adiabatic vessel contains steam at 180 [C] and 116 [kPa]. The volume is 0.5 [m^3]. Steam at 150 [C] with a quality of 0.85 is fed into the vessel until the flow stops. What are the final pressure and temperature inside the tank? What is its qualit..
A section of vertical wall is to be constructed from ready-mix concrete poured between forms. The wall is to be 3m high, .25m thick and 5m wide. Calculate the force exerted by the ready-mix concrete on each form. Determine the line of application of ..
on may 23 1998 a tanker truck loaded with gasoline p719.7 kgm3 jumped a jersey barrier and collided with an oncoming
A tank at 60 degrees C saturated water and mass 2 kg. What is the amount of heat required to convert this into saturated water?
the elevator e has a weight of 6600lb when fully loaded and is connected as shown to a counterweight w of weight of
If the deformation ef?ciency is 82% and the ef?ciency of transferring energy from the motor to the mill is 85%, what horsepower motor should be used?
a satellite is in earth with an altitude at perigee of 550 km and an altitude at apogee of 5000 kma what is the
a reversible-adiabatic ideal co2 diffuser operates between 200 kpa and 300 kpa. the inlet temperature and velocity are
A turbine is fitted in the pipeline to recover the excess energy that is available, over that required to transfer the liquid from one vessel to the other. Estimate the power that can be taken from the turbine, when the liquid transfer rate is 500..
a square 3m x 3m gate is located in the 45 sloping side of a dam. some measurements indicate that the resultant force
A submarine moves steadily through water at a depth of 350m and a speed of 5 m/s. a) find the static pressure p far away from the submarine at the 350m depth 2) find the pressure on the nose of the submarine.(kpa)
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