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Two construction workers each of mass m raise themselves on a hanging platform using pulleys as shown above. If the platform has a mass of 0.9 m, the initial distance between the pulleys and the platform is d, and the workers each pull with a force f on the ropes, what is the acceleration a of the workers? Assume the pulleys and ropes are massless.
A 5v belt drive system operates an input speed of 1250 RPM at the small sheave. The driving sheave has a pitch diameter of 6.000 in, and the driven sheave has a pitch diameter of 19.000 in. If an optimum center distance of 47 in is specified.
the compound beam is fixed at a and supported by a rocker at b and c. there are hinges pins at d and e. take f 14kn.
A square 3m x 3m gate is located in the 45* sloping side of a dam. Some measurements indicate that the resultant force of the water on the gate is 500kN.(a)Determine the preassure at the bottom of the gate.(b)Show on a sketch where this force acts..
Your engineering firm decides to build a prototype, and needs screw and nut fasteners as well as resistors and LEDs. There are machinists and electronics technicians available for in-house production. What is the most cost-effective way of acquiri..
Pure chlorobenzene is contained in a flask attached to an open-end mercury manometer. When the flask contents are at 58.3°C, the height of the mercury in the arm of the manometer connected to the flask is 747 mm, and that in the arm open to the atmos..
argon enters a compressor at steady state flow rate of 1 kgs with pressure p11 bar and temperature t127c and exits at a
a frictionless piston -cylinder device contains saturated liquid water at 200 kpa pressure. now 450 kj of heat is
air initially at a dry-bulb temperature of 45oc and relative humidity of 10 is adiabatically humidified to 60 relative
a boat is moving to the right with a constant deceleration of 0.3 ms2 when a boy standing on the deck d throws a ball
a spherical gas container made of steel has a 5-m outer diameter and a wall thickness of 6 mm. knowing that the
Assume the volume flow rate, Q, over a weir is a function of the upstream water height, h, gravity g, and channel width, b. Use dimensional analysis to find the functional form of the dependence of Q upon the other variables.
the wood beam has an allowable shear stress of 7 mpa. determine the maximum shear force v that can be applied to the
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