Lab 3: Basic Biomechanics

Question 1

The branch of physics dealing with the study of forces and the motion produced by their actions.

Answer 1

Mechanics

Question 2

involves taking the principles and methods of mechanics and applying them to the structure and function of the human body.

Answer 2

Biomechanics

Question 3

Involves factors associated with moving systems and can be divided into kinetics and kinematics.

Answer 3

Dynamics

Question 4

Deals with factors associated with nonmoving or nearly nonmoving systems.

Answer 4

Statics

Question 5

The property of matter that causes it to resist any change of its motion in either speed or direction

Answer 5

Inertia

Question 6

The tendency of force to produce rotation around an axis.

Answer 6

Torque

Question 7

A force developed by two surfaces, which tends to prevent motion of one surface across another.

Answer 7

Friction

Question 8

A vector that describes speed and is measured in units such as feet per second or miles per hour.

Answer 8

Velocity-

Question 9

Two types of mechanical quantities are:

Answer 9

vector and scalar

Question 10

Force is which type of quantity?

Answer 10

vector

Question 11

Force has two components which are

Answer 11

Magnitude and direction

Question 12

A scalar quantity has only

Answer 12

magnitude

Question 13

Examples of things measured in scalar quantity:

Answer 13

• length
• area
• volume
• mass

Question 14

Gravity is the mutual attraction between the _________ and an _________ and gravitational force is always directed __________to the center of the earth.

Answer 14

• earth
• object_
• verticaly downward

Question 15

How is mechanical advantage determined?

Answer 15

mechanical advantage = force arm/resistance arm MA=FA/RA

Question 16

Newton’s 1st Law is The Law of interia

Answer 16

Anything at rest tends to stay at rest anything in motion tends to stay in motion

Question 17

Newton’s 2nd Law is The Law of Acceleration

Answer 17

The amount of acceleration depends on the strength of the force applied to the object.

Question 18

Newton’s 3rd Law is The Law of Action- Reaction

Answer 18

Reaction- For every reaction there is an equal and opposite reaction.

Question 19

Examples of Linear Force:

Answer 19

1. two people pulling a boat with the same rope in the same direction
2. two people pulling on the same rope in opposite directions

Question 20

Example of Parallel Force:

Answer 20

A three point pressure of bracing- two points in one direction and the third is always between the first two points in the opposite direction.

Question 21

Example of Concurrent Force:

Answer 21

two people pushing a desk in a diagonal pattern. The people are perpendicular to each other.

Question 22

A person’s Center of Gravity and Base of support.

Answer 22

Stability