Biomechanics

Question 1

What is biomechanics?

Answer 1

The study of movement and the forces acting on the body during physical activity

Question 2

What are the three types if levers in the body?

Answer 2

First, second and third class levers

Question 3

What is the order of components in the first class lever?

Answer 3

Fulcrum in the middle, effort and load on either side (EFL)

Question 4

give an example of a first class lever in the body

Answer 4

the neck during a header in football- fulcrum is the neck join, effort is the neck muscles, the load in the head

Question 5

what is the order of components in a second class lever

Answer 5

load in the middle, effort and fulcrum on either (ELF)

Question 6

give an example of a second class lever in the body

Answer 6

standing on tiptoes- fulcrum is toes load is body weight effort is calf muscles

Question 7

what is the order of components in the third class lever

Answer 7

effort in the middle fulcrum and load on either side (FEL)

Question 8

give an example of a third class lever in the body

Answer 8

bicep curl- fulcrum is elbow effort is biceps load is in the hand

Question 9

what is mechanical advantage

Answer 9

when a lever allows you to move a large load with a small effort

Question 10

which type of lever has mechanical advantage

Answer 10

second class levers

Question 11

definition of effort

Answer 11

force applied by myscles to move a load

Question 12

fulcrum in the human body

Answer 12

joint where the movement takes place

Question 13

load in biomechanics

Answer 13

weight or resistance the body is trying to move

Question 14

purpose of a lever system in the body

Answer 14

to make movement more efficient by increasing speed or force

Question 15

What is biomechanics?

Answer 15

The study of the mechanical laws relating to the movement or structure of living organisms.

Question 16

True or False: Biomechanics only applies to human movement.

Answer 16

False

Question 17

Fill in the blank: The two main branches of biomechanics are __________ and __________.

Answer 17

kinematics, kinetics

Question 18

What does kinematics study?

Answer 18

The motion of bodies without considering the forces that cause the motion.

Question 19

What does kinetics study?

Answer 19

The forces that cause motion.

Question 20

Multiple choice: Which of the following is a type of motion studied in biomechanics? A) Linear B) Rotational C) Angular D) All of the above

Answer 20

D) All of the above

Question 21

What is the term for the point where all the mass of an object is concentrated?

Answer 21

Center of mass

Question 22

True or False: The center of mass is always located within the physical body.

Answer 22

False

Question 23

Fill in the blank: __________ is the resistance of an object to changes in its state of motion.

Answer 23

Inertia

Question 24

What is the principle of conservation of momentum?

Answer 24

In a closed system, the total momentum before an event is equal to the total momentum after the event.

Question 25

Multiple choice: Which of the following factors does NOT affect the trajectory of a projectile? A) Angle of release B) Speed of release C) Weight of the object D) Color of the object

Answer 25

D) Color of the object

Question 26

What is the role of friction in biomechanics?

Answer 26

Friction provides resistance that can influence movement and stability.

Question 27

True or False: A high center of mass increases stability.

Answer 27

False

Question 28

What is the term for the force exerted by a surface to support the weight of an object resting on it?

Answer 28

Normal force

Question 29

Fill in the blank: __________ is the measure of the force of gravity on an object.

Answer 29

Weight

Question 30

Multiple choice: Which type of lever has the fulcrum in the middle? A) First class B) Second class C) Third class D) None of the above

Answer 30

A) First class

Question 31

What is the definition of torque?

Answer 31

The rotational equivalent of linear force, calculated as the product of force and the distance from the pivot point.

Question 32

True or False: Muscle contractions can only produce movement in one direction.

Answer 32

False

Question 33

What is the role of tendons in the musculoskeletal system?

Answer 33

Tendons connect muscles to bones, allowing for movement.

Question 34

Fill in the blank: __________ is the ability of a muscle to exert force.

Answer 34

Strength

Question 35

Multiple choice: Which of the following is NOT a type of muscle contraction? A) Isometric B) Isotonic C) Eccentric D) Static

Answer 35

D) Static

Question 36

What is the primary function of ligaments?

Answer 36

To connect bones to other bones and provide stability to joints.

Question 37

True or False: The range of motion is the same for all joints in the body.

Answer 37

False

Question 38

What is the significance of the angle of release in projectile motion?

Answer 38

It determines the height and distance a projectile will travel.

Question 39

Fill in the blank: __________ is the force that opposes the motion of an object through a fluid.

Answer 39

Drag

Question 40

Multiple choice: Which of the following factors can improve athletic performance through biomechanics? A) Technique B) Equipment C) Training D) All of the above

Answer 40

D) All of the above