अपकेंद्री तनाव (centrifugal tension) को नगण्य मानते हुए, एक पूर्णतः लोचदार स्थिर बेल्ट में प्रारंभिक तनाव निम्नलिखित में से किसके बराबर होता है?

If α denotes the lead angle and θ denotes the angle of friction, then the efficiency of a screw jack is given by:

The most ideal follower motion programme for a high-speed cam-follower engine system to avoid shocks is:

In a four-bar linkage, if the lengths of the links are 100 mm (fixed), 150 mm, 200 mm, and 250 mm, what type of mechanism is it according to Grashof's law if the shortest link is fixed?