An overhead crane carries a load of 50 tonne. under static conditions the maximum deflection is 5 mm (excluding the elongation of the ropes) and the maximum bending stress is 60 mpa. the ropes have a combined cross-sectional area of 1 x 10 m². include the elongation of the rope and calculate the maximum deflection at the end of the rope and the maximum stress induced in the crane if the 50 tonne is lowered at a constant speed of 0,1 m/sec and then suddenly stopped when the rope has a length of (a) 3 m; and (b) 20 m (e = 210 gpa).

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?