Engineering Answers

The substation bus bar is made up of 1.5 inches round copper bars 30 ft long. What is the resistance of each bar?

the pitch of a jackscrew shown in figure 2 is 0.3 cm and has a lever arm of 60 cm lenght. What force at the end of the lever arm will raise a load of 190kg if the efficiencyof the machine is 12%?

The substation bus bar is made up of made 1.5 inches round copper bars 30 ft long. What is the resistance of each bar?

A cantilever is 3 meters long. The free end is on the left. On the left is a point load of 12kN. One meter from the left a bending moment of 10 kNm anticlockwise is applied.Take E = 200 GPa and I = 37 x 10^-6m⁴

Use Macaulay' s method and take x = 0 on the left.

4. Two shafts A and B are connected by rolling cones and turn in the same direction. Shaft A makes 300 rpm while shaft B makes 100 rpm. Calculate the cone angle of each cone and the diameter of each base if the base of cone B is 2 in. from the vertex. θ = 30°

Two shafts, having axes in the same plate intersecting at an angle of 45°, turn in opposite senses at 30 rpm and 90 rpm. Draw a pair of cone to be located on these shafts and turn in pure rolling contact. Diameter of base of smaller cone is 1 in. Calculate the cone angles.

2.) Two solids of right section 2 and 4 are in pure rolling contact between the circular arcs. What is the angular speed ratio for the position shown? Determine the size of the angles , β, and Ø in degrees, and of the radii x and y in inches.

3.

The radiation shape factor of the circular surface of a thin hollow cylinder of 10 cm diameter and 10 cm length is 0.1716. What is the shape factor of the curved surface of the cylinder with respect to itself

3. Two parallel shafts, 24 inches apart and having a speed ratio of 3, are connected by cylinders in pure rolling

contact. Determine the diameters of the cylinders: (1) when they turn in opposite directions; and (2) when

they turn in the same direction

2. Two parallel shafts connected by rolling cylinders turn in the same direction 150 rpm and 100 rpm

respectively. The smaller cylinder is 16 in. in diameter. How far apart are the axes of the shafts?