Forces (M3)

Question 1

Torque of a couple

Answer 1

The product of one of the forces of a couple and the perpendicular distance between forces

Question 2

Principle of moments

Answer 2

For a body in rotational equilibrium, the sum of the anticlockwise moments about a point is equal to the sum of clockwise moments about that same point

Question 3

Archimedes’ principle

Answer 3

The upthrust exerted on a body immersed in a fluid, whether full or or partially submerged, is equal to the weight of the fluid that the body displaces

Question 4

Pressure of a liquid of height h

Answer 4

Pressure = height of the column X density of the fluid X acceleration of free fall (9.81)