For the planar mechanism of figure below, link 4 serves as slider support which is free to rotate about the z axis, but has point D kept stationary. Link 3 is a rigid member continuous over the rotational joint B. The lengths of the links 2 and 5 are respectively 3 cm and 7 cm, and the distance AB is 6 cm. The angles of the links 2, 3, and 5 with the positive horizontal are denoted as 0, 0, 02 B 5 120° E X

Gentlemen, please help to solve a,b,c as I faced confusing questions about screw jack. Conditions are: screw jack is lifting 3.2 tonnes, screw pitch is 12 mm, diameter of the screw is 5 mm. Coefficient of friction was not given but I think we will need it for total force calculation, lets take it 0.2. a) Calculate horizontal component to move the load - what is ment here by horizontal component? b) Calculate vertical component to move the load - what is ment here by vertical component? c) Total force needed to move the load with a lever of 0.82m d) Velocity ratio (VR=distance by effort/distance by load)       Distance by effort (lever)=2 x 3.14 x 0.82 = 5.15m       Distance by load = pitch= 12mm= 0.012 m        VR=5.15/0.012= approx 429. e) Calculate efficiency. For this we need to have MA       (mechanical advantage). It can be calculated when we know total force.          Efficiency=Load (3200 x 9.8) / effort

P) Draw the kinematic diagram of the excavator arm and calculate the mobility of the mechanism

please answer, thank you