forces

Question 1

define moment of a force

Answer 1

The moment of a force is defined as the product of the force and the perpendicular distance of its line of action from the pivot or axis of rotation

Question 2

define centre of gravity

Answer 2

The centre of gravity of an object is the point through which the entire weight of a body may be considered to act

Question 3

define hooke’s law

Answer 3

If the limit of proportionality is not exceeded, the extension is directly proportional to the force applied

Question 4

hooke’s law formula

Answer 4

F=kx

Question 5

define fields of force

Answer 5

A field of force refers to a region of space within which a body experiences a force without being in physical contact with any other body

Question 6

define a torque of a couple

Answer 6

The torque of a couple is defined as the product of one of the forces of the couple and the perpendicular distance between the lines of action of the forces

Question 7

conditions for equilibrium

Answer 7

1. the resultant force acting on it equals to zero
2. the resultant force acting about any point equals to zero