forces

Question 1

Hooke’s Law definition

forces

Answer 1

within the limit of proportionality, the extension produced in a material is directly proportional to the force applied

Question 2

Centre of Gravity definition

forces

Answer 2

the point at which the whole weight of the body appears to act

Question 3

Upthrust definition

forces

Answer 3

upward force on a body partially or fully immersed in a fluid due to the pressure difference in the fluid

Question 4

Principle of Floatation

forces

Answer 4

if an object is floating in equilibrium, the upthrust is equal in magnitue & opposite in direction to the weight of the object

Question 5

Principle of Moments

forces

Answer 5

For a body in rotational equilibrium, the sum of clockwise moments about any axis of rotation/pivot is** equal** to the sum of anti-clockwise moments about the same axis

Question 6

Couple definition

forces

Answer 6

a pair of forces acting on the same body that are equal in magnitude but opposite in direction & produce rotation only

Question 7

Torque of a Couple definition

forces

Answer 7

the turning effect of a couple