forces 1.5.2

Question 1

definition: moment of force/torque

Answer 1

product of force & perpendicular distance from pivot

Question 2

formula

Answer 2

= force x perpendicular distance

Question 3

unit

Answer 3

N m

Question 4

types of moments

Answer 4

1. clockwise
2. anticlockwise

Question 5

principle of moments

Answer 5

clockwise moment = anticlockwise moment

Question 6

factors on which moment of force depends on

Answer 6

1. F : (greater F, lesser moment)
2. distance : (greater distance, greater moment)

Question 7

less the force…

Answer 7

… more the distance = more the turning effect

(inversely proportional)

Question 8

useful tip for moments

Answer 8

downward force = upward force

Question 9

definition: center of gravity

Answer 9

point at which weight of the body acts

Question 10

when there is no resultant force and
no resultant moment…

Answer 10

… object is in equilibrium

Question 11

turning effect

Answer 11

when a force causes an object to rotate / would make the object rotate if there were no resistive forces

Question 12

unstable

Answer 12

object; likely to topple over
bcs it has a high center of gravity and narrow base

Question 13

position of the center of gravity of an irregularly shaped plane lamina (pg 76)