45) A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is

46) The cam follower generally used in automobile engines is

47) A chain consisting of four links and four joints is called a kinematic chain.

48) Which of the following is an open pair?

49) The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear.