Lecture 3-Physical Biomechanics II

Question 1

What are the linear force systems?

Answer 1

Coplanar-same plane
Concurrent-same point
Colinear-same line

Question 2

What are concurrent force systems?

Answer 2

Coplanar
Nonparellel
Concurrent

Question 3

What is Principle of Transmissibility?

Answer 3

A force can be considered to achieve the same results as it acts anywhere along its line of application

Question 4

What is concurrent force systems related to?

Answer 4

Force vector composition and resolution

Question 5

Levers

Answer 5

A rigid bar that revolves about an axis when a force is applied to it

Question 6

Law of the lever?

Answer 6

The force will balance the weight when the moment of force equals the moment of the resistance

Question 7

Moment of force

Answer 7

The measurement of the tendency to cause motion about an axis

Question 8

Torque

Answer 8

The magnitude of force multiplied by its perpendicular distance from the action line of force to it axis or force arm.
FxD=Torque

Question 9

Equilibrium

Answer 9

The balance of torque (moments)=stability

Question 10

Mechanical advantage

Answer 10

The advantage that a force has due to the length of its lever

Question 11

First class lever

Answer 11

Fulcrum between force and resistance

Question 12

Second class lever

Answer 12

Resistance between fulcrum and force

Question 13

Third class lever

Answer 13

Force between resistance and fulcrum

Question 14

What is second condition of equilibirum

Answer 14

Parallel forces
Coplanar
Not concurrent

Question 15

Force couple

Answer 15

“Two parallel forces equal in magnitude, opposite in direction (in the same plane).

Question 16

Static equilibirum

Answer 16

Related to Newton’s first law

An equilibirum status whereas the condition of a body is at rest with the velocity equaling zero

Question 17

Dynamic Equilibirum

Answer 17

Related to Newton’s second law

An Equilibrium status whereas the condition of the boy is that of a constant velocity other than zero