A linear actuator having a in single-thread Acme screw is used to raise a load of 1600 lb. A plain thrust collar having a 0.8 in mean diameter is used. Coefficients of running (kinetic) friction are estimated as μ= 0.13 and c = 0.1. a.) Determine the screw pitch, lead, thread depth, mean (pitch) diameter, and lead angle. b.) Estimate the torque needed to raise the load. c.) Estimate the "overall" efficiency of the linear actuator when raising the load. 0.125 in, h 0.0625 in, dm 0.5625 in, λ = 4.046° Ans. a.) P = 0.125 in, L b.) TLR = 157.1 in lb = 13.09 ft lb c.) 17 = 20.26%

Please solve for 4.139  thx

Use Share Sketch to create this part with one sketch. Pivot lock (dimensions are in inches. The circular features in the design are all aligned to the two centers at the base.

The figure shows the chain drive of a bicycle. How far will the bicycle move if the pedals are rotated through 180°? Assume the radius of the bicycle wheel is 12.7 inches. The bicycle will travel approximately (Round to the nearest tenth.) in. C -1.95 in 4.21 in