Q: In lab tests on a 9.25-cm cube of
In lab tests on a 9.25-cm cube of a certain material, a force of 1375 N directed at 8.50° to the cube (Fig. E11.37) causes the cube to deform through an angle of 1.24°. What is t...
See AnswerQ: A brass wire is to withstand a tensile force of 350 N
A brass wire is to withstand a tensile force of 350 N without breaking. What minimum diameter must the wire have?
See AnswerQ: In a materials testing laboratory, a metal wire made from a
In a materials testing laboratory, a metal wire made from a new alloy is found to break when a tensile force of 90.8 N is applied perpendicular to each end. If the diameter of the wire is 1.84 mm, wha...
See AnswerQ: A uniform 300-N trapdoor in a floor is hinged at
A uniform 300-N trapdoor in a floor is hinged at one side. Find the net upward force needed to begin to open it and the total force exerted on the door by the hinges (a) if the upward force is applied...
See AnswerQ: A siphon (Fig. P12.88) is a convenient
A siphon (Fig. P12.88) is a convenient device for removing liquids from containers. To establish the flow, the tube must be initially filled with fluid. Let the fluid have density r, and let the atmos...
See AnswerQ: Two ladders, 4.00 m and 3.00 m
Two ladders, 4.00 m and 3.00 m long, are hinged at point A and tied together by a horizontal rope 0.90 m above the floor (Fig. P11.89). The ladders weigh 480 N and 360 N, respectively, and the center...
See AnswerQ: You make two versions of the same object out of the same
You make two versions of the same object out of the same material having uniform density. For one version, all the dimensions are exactly twice as great as for the other one. If the same torque acts o...
See AnswerQ: One end of a post weighing 400 N and with height h
One end of a post weighing 400 N and with height h rests on a rough horizontal surface with ms = 0.30. The upper end is held by a rope fastened to the surface and making an angle of 36.9° with the pos...
See AnswerQ: A block with mass m is revolving with linear speed v1 in
A block with mass m is revolving with linear speed v1 in a circle of radius r1 on a frictionless horizontal surface (see Fig. E10.40). The string is slowly pulled from below until the radius of the ci...
See AnswerQ: When an object is rolling without slipping, the rolling friction force
When an object is rolling without slipping, the rolling friction force is much less than the friction force when the object is sliding; a silver dollar will roll on its edge much farther than it will...
See Answer
