Moments

Question 1

What causes rotation?

Answer 1

Torque
Couple
Moment of Force
Moment

Question 2

Counterclockwise rotations are _____ while clockwise rotations are _____

Answer 2

Positive, negative

Question 3

How can moment be calculated?

Answer 3

M= r x F

Question 4

What is moment of force?

Answer 4

the product of an applied force and the perpendicular distance between that point and the line of action of the force

Question 5

Which force will generate the largest magnitude moment around the point?

Answer 5

B

Question 6

What is the moment generated by force F around point X?

Answer 6

r= sin(30) (1m)
r= (0.5) (1m)
r= 0.50m
M= (0.50m) (10N)
M= 5Nm

Question 7

The moment arm is greatest in size when…

Answer 7

the applied force is oriented perpendicular relative to the rotating segment

Question 8

As the moment arm size increases, the force required to produce an equivalent moment ____

Answer 8

Decreases

Question 9

As the moment arm size decreases, the force required to produce an equivalent moment _____

Answer 9

Increases

Question 10

How does rotation about muscles occur?

Answer 10

The line of action of the muscle force must pass outside of the centre of rotation of the joint