Correct Answer : Option (D) : All of the above
Explanation : Two forces are said to be in equilibrium only if the forces are equal in magnitude, opposite in direction, and are collinear. This is equilibrium law.
Correct Answer : Incorrect
Explanation : Coefficient of restitution for elastic bodies is 0 - 1.Coefficient of restitution for perfect elastic bodies is 1.
Correct Answer : Square-threaded
Explanation : In the machines, square threaded screws are employed. Because screws are commonly employed as fasteners. The fundamental benefit of screws is that the friction aids in the structure’s retention. Screws also aid in the fast and efficient joining of the structure.
Correct Answer : Agree