Moments on bodies

Question 1

For a body in equilibrium, do we have additional considerations?

Answer 1

• force equilibrium (as for particles)
• moments
• line of action

Question 2

What acceleration does Force cause?

Answer 2

Translational

Question 3

What acceleration do Moments cause?

Answer 3

Rotational

Question 4

What is an equation for the moment of a couple?

Answer 4

M = F.a (a = leverarm)

Question 5

Line of action if a resultant force on a body? In this case of a body, a force has:

Answer 5

• magnitude
• direction
• line of action
  (Same as for a particle)

Question 6

How do we find the resultant of a body with more than two forces?

Answer 6

To find the resultant, we repeat the above process recursively
Find the resultant of F1 and F2 -> R1(of F1, F2)
Then R1 and F3 -> R2 (of R1, F3) etc
Until you find the resultant R of all the forces that give static equivalence

Question 7

What is F1 and F2 are parallel, but are also equal in magnitude and act in opposite directions, i.e. F1 = -F2? or in other words, we have a couple.

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Question 14

Answer 14

Question 15

What if F1 and F2 are parallel, but are also equal in magnitude and act in opposite directions , i.e. F1 = F2? or in other words, we have a couple

Answer 15