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A 90-N.m torque is applied to a hollow shaft having the cross section shown. Neglecting the effect of stress concentrations, determine the shearing stress at points a and b.
To calculate a rocket’s position, velocity, and acceleration at different points in time. A rocket, initially at rest on the ground, accelerates straight upward with a constant acceleration of 58.8m/s^2
Neglect the mass of the cables and treat the chair and person as one particle.
Structural Analysis 8th edition 4-40 draw the shear and moment diagrams for each member of the frame. Assume A is a rocker, and D is pinned.
Starting from rest, the boy runs outward in the radial direction from the center of the platform with a constantacceleration of 0.5 m/s2. If the platform is rotating ata constant rate θ=0.2 rad/s,
A reinforced concrete beam having the cross section shown is on a simple span of 28ft. It carries uniform service loads of 3.60 kips/ft live load and 2.20 kips/ft dead load. Check the adequacy of the beam with respect to the moment. Use f1c= 3000 psi..
A system consists of a gas confined between a cylinder and piston such that work and heat may cross the boundary. What type of system is that? What type of system is a free body as used in mechanics or civil engineering? What type of system would you..
A floor is to be supported on hardwood timber joists that are spaced at 0.5m centres and span 5.0m. The joists support flooring 20mm thick and an applied live load of 2kN/m2
A marble on the end of a massless string is rotating about a hole at O on a flat(horizontal) frictionless table. The mass originally rotates with an angular velocity theta'=w0 and r is constant at r1.
a 20 kg block slides along the rough surface for which the coefficient of kinetic friction is 0.2. The block strikes a nonlinear spring with a speed of v=4.5 m/s. The spring is termed "nonlinear" because it has resistance of Fs=ks^2
A new athletics stadium with a curved concrete roof is beingdesigned. Each of the end walls is 25 metres long. Its height ymetres is given by
A structural steel beam is attached to a column with bolts. The downward force on the connection is 150 kips. What bolt sizes must be used if the allowable shear stress is 25.0 ksi
Two capillary tubes have radii of 1 mm and 0.5 mm respectively. They are placed in a liquid whose density is 0.80 g/cc and which completely wets the walls of the tube, i.e. theta = 0. The difference in height of capillary rise is 0.74 cm.
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