Bum

Question 1

Centre of mass

Answer 1

Thé centre of mass is the point through which any externally applied force produces straight line motion but no rotation

Question 2

Centre of gravity

Answer 2

Imaginary point where the entire weight of an object appears to act

Question 3

Moment

Answer 3

Force x perpendicular distance from the line of action of the force to the axis or point of rotation

Question 4

Equilibrium

Answer 4

A body is in equilibrium when the net force and net moment acting on it are zero

Question 5

The principle of moments

Answer 5

For a body in rotational equilibrium the sum of the anti-clockwise moments is equal to the sum of clockwise moments

Question 6

Torque of a couple

Answer 6

One of the forces x perpendicular distance between them

Question 7

Couple

Answer 7

A pair of equal and parallel, but opposite forces acting at points separated by a distance, which only cause rotation