Chapter 11

Question 1

Explain the laws of inertia

Answer 1

A body or object either remains at a stationary position or continues to move at a constant velocity, unless an external force is exerted upon it

Question 2

What is the law of acceleration?

Answer 2

F=(m x a)

This formula describes the relationship between the force of an object (f), its mass (m) and it’s acceleration (a)

Question 3

What is the law of action-reaction

Answer 3

A reaction force arises whenever one body exerts a force on another. The reaction force is equal and opposite in magnitude and direction to the applied force

Question 4

What is biomechanics

Answer 4

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

Question 5

List and explain the different types of forces

Answer 5

External forces - forces that originate outside the object or body that we wish to study ie. gravity, wind resistance
Internal forces - forces that arise within the system we are interested in studying ie. when a muscle contracts