5. Torque: Terms & Definitions

Question 1

Center of Gravity / Mass

Answer 1

A point on an object where weight is equally distributed in all directions

Question 2

Centric Force

Answer 2

Force that is applied to the center of gravity of an object resulting in translation only

Question 3

Couple

Answer 3

two eccentric forces acting at different points on an object that rea opposite in direction but equal in magnitude, resulting in pure moment

Question 4

Eccentric Force

Answer 4

A force that is applied away from the center of gravity resulting in translation and roatation

Question 5

First Class Lever

Answer 5

A lever where the fulcrum is in the middle and effort and resistance are on either side

Example: scissors or neck joint

Question 6

Force Arm

Answer 6

The force arm is the distance between the point where force is applied and the fulcrum in a lever system.

Question 7

Fulcrum

Answer 7

The fulcrum is the fixed point around which a lever pivots or rotates.

Question 8

Lever

Answer 8

a rigid object that rotates about a fulcrum that is used to enchance force, making ot easier to move a load

Question 9

Mechanical Advantage

Answer 9

Ratio of output force to input force

Question 10

Moment Arm

Answer 10

the distance between the resistance (object being moved) and the fulcrum

Question 11

Pure Moment

Answer 11

pure rotation

Question 12

Resistance Arm

Answer 12

the distance between the resistance (object being moved) and the fulcrum

Question 13

Second Class Lever

Answer 13

A lever where teh resistance is in the middle and the effort and fulcrum are on either side

Question 14

Third Class Lever

Answer 14

A lever where the effort is in the middle and the fulcrum and resistance are on either side

Question 15

Torque

Answer 15

a force that has a tendecy to create rotation