Rigid Body mechanics

Question 1

what is a moment + formula

Answer 1

a turning effect of a force around a particular point. Moments occur when forces cause objects to rotate about some pivot. Formula is: Moment (in Nm) = Force (in N) x Perpendicular distance (in m)

Question 2

what is the formula for a moment around a non-perpendicular force?

Answer 2

M = Frcos(theta)

Question 3

what is the principle of moments

Answer 3

If a number of parallel forces balance a beam, then the sum of the clockwise moments must be equal to the sum of the anti- clockwise moments

Question 4

what is a torque + formula (non-perpendicular)

Answer 4

The change in rotational motion due to a turning force is called torque. Formula: Torque = Force x distancesin(theta)

Question 5

what is a couple + formula

Answer 5

a couple is a pair of equal and opposite coplanar forces that tends to produce rotation only (in Nm). Formula: magnitude of one of the forces multiplied by their perpendicular separation