Hinge And Fixed Joint|Backbone

Hinge joint is :

Hinge joints

Component not forming the backbone of 'B'-DNA is

Go through the following matches (i) wrist joint - anuglar joint (ii) Interphalangeal joint - Angular joint (iii) Metacarpophalangeal - Hinge joint (iv) Carpal bones - Gliding joint Which of these are correct?

Joints (जोड़)|Synovial Joints (श्लेष जोड़)|Fibrous Joints / Fixed Joints (रेशेदार जोड़ / स्थिर जोड़)|Human Muscles (मानव पेशियाँ)|Summary

Joints (जोड़)|Synovial Joints (श्लेष जोड़)|Fibrous Joints / Fixed Joints (रेशेदार जोड़ / स्थिर जोड़)|Human Muscles (मानव पेशियाँ)|Summary

Four weightless rods of length l each are connected by hinged joints and form a rhomb (Fig). A hinge A is fixed, and a load is suspended to a hinge C. Hinges D and B are connected by a weightless spring of length 1.5l in the undeformed state. In equilibrium, the rods form angles alpha_(0) = 30^(@) with the vertical. Determine the period T of small oscillations of the load.

A square hinged -structure (ABCD) is formed with four massless rods which lie on the smooth horizontal table. The hinge -D of structure is fixed with table and hinge A , hinge -B and hinge- C are free to move on the table. A point mass m is attached at hinge -B , and an ideal spring of stiffness k is connected between hinge -A and hinge- C as shown in the figure. System is in equilibrium. The mass m is slightly along line BD and released to perform SHM. The time period of SHM is pisqrt((nm)/k) . Find