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1 cable ab passes over the small ideal pulley c with- out a change in its tension what length of cable cd is required
a woodcutter wishes to cause the tree trunk to fall uphill even though the trunk is leaning downhill with the aid of
calculate the force and moment reactions at the bolted base o of the overhead traffic-signal assembly each traffic
1 a carpenter holds a 12-lb 2-in by 4-in board as shown if he exerts vertical forces on the board determine the forces
an axial-flow turbine stage is to be designed for free-vortex conditions at exit from the nozzle row and for zero swirl
the nose-wheel assembly is raised by the application of a torque m to link bc through the shaft at b if the arm and
1 the power unit a of the tractor-scraper has a mass of 4 mg with mass center at g1 the fully loaded trailer-scraper
1 the designers of lamp mechanisms such as that shown in the figure usually rely on joint friction to aid in
1 the ramp is used as passengers board a small com- a muter airplane the total mass of the ramp and six passengers is
a round bar made of mild steel broken in a tensile test exhibited a cup and cone failure examination showed that the
an infinite steel plate 30 mm thick is subjected to a tensile stress it contains a through thickness crack
1 the automobile bumper jack is designed to support a 4000-n downward load begin with a free-body diagram of bcd and
a 2000 w p electric kettle is powered by a 240 v 3-phase supply via a plug with a fuse of 13 a a calculate the current
a name a code of practice for welding steels that is commonly used the world over b pwht is not used for
visual examination and metallurgical examination are both important steps in obtaining physical evidence explain why
you are in an isolated site with only a hardness testing machine a vice and some rudimentary tools you have a length of
1 determine the forces in members cg and gh of the symmetrically loaded truss2 calculate the forces in members ab bg
you need to go to a site which has good lighting conditions to take photographs of a failure where the components are
a why is it that large steel components made of high-strength martensitic steels sometimes fail by brittle
the data for a failed wheel pinion from the tin dredge are given as in the followingspur gear 20deg pressure angleno of
a number of bucket bushes in a tin dredge move slowly and operate under a high load if you are required to choose a
the small remotely-controlled robotic vehicle of probs 5171 and 5172 is shown again here the 200-m tether has a slight
a length of power cable is suspended from the two towers as shown the cable has a mass of 20 kg per meter of cable if
1 the figure shows the cross section of a rectangular gate 4 m high and 6 m long perpendicular to the paper which
a the hardness of a steel is often used interchangeably with its tensile strength why is this practice used