Biomechanics of Exercise

Question 1

Define biomechanics.

Answer 1

The physical study of movement

Question 2

What is stability?

Answer 2

The ability to maintain a balanced state

Question 3

What is force?

Answer 3

The interaction that creates work, action, or physical change

Question 4

What is magnitude?

Answer 4

How much force is applied to the dumbbells, barbells, or machine handles

Question 5

What is direction?

Answer 5

The way in which the force is applied

Question 6

What is the point of application?

Answer 6

Where the force is applied on the body or implement being used

Question 7

What is the line of action (Line of force)?

Answer 7

An imaginary straight line drawn from the point of application of force through the direction of force

Question 8

What is the angle of pull?

Answer 8

Angle at which a muscle pulls relative to the long axis of the bone on which it pulls

Question 9

What is work?

Answer 9

Force x distance. Measured in foot-pounds and similar units

Example: lifting a 200-pound barbell 8 feet requires 1,600 foot-pounds of work

Question 10

Define power.

Answer 10

The work done in a unit of time

Question 11

What is Newton’s First Law?

Answer 11

An object at rest tends to stay at rest and an object in motion tends to stay in motion; unless acted upon by an outside force

Question 12

What is inertia?

Answer 12

Tendency for an object to remain in its current state( in motion or at rest)

Question 13

What are the two types of inertia?

Answer 13

1. Resting inertia

2. Moving inertia

Question 14

What is resting inertia?

Answer 14

An object at rest will stay at rest unless acted upon by an outside force

Question 15

What is moving inertia?

Answer 15

An object in motion will stay in motion unless acted upon by an outside force

Question 16

What is range of motion(ROM)?

Answer 16

The movement of a joint from full flexion to full extension

Question 17

What is Newton’s Second Law?

Answer 17

In order to create a force, you must place a mass into motion with acceleration and a change in velocity

Question 18

What is mass?

Answer 18

A body of coherent matter

Question 19

What is acceleration?

Answer 19

The rate of change of velocity per unit of time

Question 20

What is velocity?

Answer 20

The speed of something in a given direction

Question 21

What is momentum?

Answer 21

The quantity of motion of a moving body, measured as a product of its mass and velocity.

Question 22

What is the formula for finding Force?

Answer 22

Force = Mass x Acceleration

Question 23

Gravity exhibits an acceleration of approximately ____ grey per second squared.

Answer 23

32.2

Question 24

What is Newton’s Third Law?

Answer 24

Objects in contact exert equal and opposite forces on each other

Question 25

What is a lever?

Answer 25

Rigid bar that turns about an axis of rotation or a fulcrum

Question 26

What is a fulcrum?

Answer 26

Point on which a lever rests or is supported and on which it pivots

Question 27

Describe a first-class lever?

Answer 27

Fulcrum in the middle, the effort is applied on one side of the fulcrum and the resistance on the other

Question 28

What is a second-class lever?

Answer 28

A lever in which the load lies between the fulcrum and the effort

Question 29

What is a third-class lever?

Answer 29

A lever in which the effort is placed between the fulcrum and the load

Question 30

What is torque?

Answer 30

The magnitude of twist around an axis of rotation (fulcrum)

Question 31

What is gravity?

Answer 31

The downward pulling force that creates resistance

Question 32

What is the center of gravity?

Answer 32

Point in the body around which your weight is equally distributed

Question 33

What is line of gravity?

Answer 33

Vertical line straight down from the center of gravity

Question 34

What is kinesthesis?

Answer 34

The ability to perceive your position and movement of the body or body limbs in space

Question 35

What is a visual reference point?

Answer 35

A chosen point of focus to aid in stability and balance