Questions from Mechanics

Q: A sign is supported by a pipe (see figure) having

A sign is supported by a pipe (see figure) having an outer diameter 110 mm and inner diameter 90 mm. The dimensions of the sign are 2.0 m × 1.0 m, and its lower edge is 3.0 m...

Q: A traffic light and signal pole is subjected to the weight of

A traffic light and signal pole is subjected to the weight of each traffic signal WS = 45 lb and the weight of the road lamp WL = 55 lb. The pole is fixed at the base. Find the principal normal stress...

Q: Repeat the preceding problem but now find the stress state on Element

Repeat the preceding problem but now find the stress state on Element A at the base. Let WS = 240 N, WL = 250 N, t = 5 mm, d = 360 mm. See the figure for the locations of element A and all loads. D...

Q: A bracket ABCD having a hollow circular cross section consists of a

A bracket ABCD having a hollow circular cross section consists of a vertical arm AB (L = 6 ft), a horizontal arm BC parallel to the x0 axis, and a horizontal arm CD parallel to the z0 axis (see figure...

Q: A gondola on a ski lift is supported by two bent arms

A gondola on a ski lift is supported by two bent arms, as shown in the figure. Each arm is offset by the distance b = 180 mm from the line of action of the weight force W. The allowable stresses in th...

Q: A solid circular bar is fixed at point A. The bar

A solid circular bar is fixed at point A. The bar is subjected to transverse load V = 70 lb and torque T = 300 lb-in. at point B. The bar has a length L = 60 in. and diameter d = 3 in. Calculate the p...

Q: Determine the maximum tensile, compressive, and shear stresses at points

Determine the maximum tensile, compressive, and shear stresses at points A and B on the bicycle pedal crank shown in the figure. The pedal and crank are in a horizontal plane and points A and B are lo...

Q: A double-decker bicycle rack made up of square steel tubing

A double-decker bicycle rack made up of square steel tubing is fixed at A (figure a). The weight of a bicycle is represented as a point load applied at B on a plane frame model of the rack (figure b)....

Q: Repeat Problem 22 but replace the square tube column with a circular

Repeat Problem 22 but replace the square tube column with a circular tube having a wall thickness t = 5 mm and the same cross- sectional area (3900 mm2) as that of the square tube in figure b in Probl...

Q: An L-shaped bracket lying in a horizontal plane supports a

An L-shaped bracket lying in a horizontal plane supports a load P = 150 lb (see figure). The bracket has a hollow rectangular cross section with thickness t = 0.125 in. and outer dimensions b = 2.0 in...