hy is the external load not shown in the free body diagram of limk 2 and 4?

. A helical compression spring is to be made of oil-tempered wire of 4 mm diameter with a spring index of C=10. The spring is to operate inside a hole, so buckling is not a problem, and the ends can be left plain. The free length of the spring should be 80 mm. A force of 50 N should deflect the spring 15 mm. (Take: G= 77 GPa) 1- Determine the minimum hole diameter for the spring to operate in. 2-Determine the solid length. 3-Determine a static factor of safety based on the yielding of the spring if it is compressed to its solid length.

A shaft acting as simple supported beam is having a static deflection of 2.72 mm under a flywheel. The critical speed in rad/sec will be

Q3. You should draw a three DoF (Degree of freedom) eight link (n=8) mechanism with revolute joints. You should verify DoF mechanism using mobility formulations.

K1 = (60/2)+3=33

(a) A hollow C15 steel(oy= 235.4Mpa, oy=425Mpa shaft transmits 15kW at 250rpm as shown in figure Task 1a. It is supported on two bearings 750mm apart. A 500mm pulley whose weight is 1000N is keyed to the shaft at a distance of 100mm to the left of left bearing. A pinion having 75teeth and 4mm module is mounted at 150mm to the left of right bearing. The pulley is driven by a belt downward at an angle of 60°to the horizontal and towards the observer. The pinion drives a gear placed directly over it. Tension ratio=3 and diameter ratio=2. Determine the diameter of the shaft with ASME code. Assume the shaft rotates clockwise when viewed from right bearing and $=20⁰ (T₁+T₂) sin 60+ W, 60⁰ (T₁+T₂.) cos 60 Driven T₁+T₂ Pulley A Figure Task 1a

Please only do if you have knowledge and 100% sure and please only handwritten I need or skip

A steel wire 2 mm diameter is held between fixed bearings. The wire weighs 0.241N/m and the flexural stiffness is 0.157 N.m2. If the highest critical speed is 5000 RPM with the length of the wire of 1.0 m, what is the approximate no. of mode (your answer should be a whole number).

Design a helical extension spring to hold the roller follower against the cam as shown in Figure 1. The maximum extension of spring (ymax = 8.3 mm), the dynamic load varies from 250 N at the low position and 400 N at the high position . The diameter of the circular cam is 200 mm rotates off center with an eccentricity of 25 mm and operates the roller follower that is carried by the arm. The speed of the cam is 200 rpm. Design choices, (C= 10 ), shear modulus G= 80 GPa , A227 as a material for the spring, Wire endurance limit Sew = 310 MPa, factor of safety for spring body is 1.5. The spring ends are standard. a. Check the initial tension in the spring and compart it with minimum load. b. Determine the physical parameters of the spring. c. Check the surging of spring. 200 mm -100 mm- - - Spring 25 mm ww

A narrow V-belt (wedge belt) transmits power from an internal combustion engine operating at 700 rpm to the shaft of a dough mixer (medium duty) operating at 50 rpm. The internal combustion engine develops a nominal power of 50 kW and the dough mixer operates for no more than 8 hours per day. Which of the following belts can be used for this application? Hint: First determine the design load by using an appropriate service factor from page F12 in Appendix H in the Design Manual. SPC only SPB or SPC SPA or SPB SPB only