Biomechanics

Question 1

What are Newton’s laws

Answer 1

1st law (inertia) - a body continues in a state of rest or uniform motion in a straight line unless it is acted upon by an external force

2nd (acceleration) - the acceleration of a body is proportional to the force acting on it and takes place in the direction the force acts

3rd (action - reaction) - to every action there is an equal and opposite reaction

Question 2

What are the different movement planes

Answer 2

Sagittal plane - movement in a forward and backward direction (divides the body into left and right)

Frontal plane - movement in a side to side direction (plane divides the body into anterior and posterior)

Traversal plane - rotation around the central axis (plane divides the body in superior and inferior)

Question 3

Definition of speed and velocity

Answer 3

Speed - the rate at which someone or something moves

Velocity - the speed of something in a given direction