Biomechanics

Linear motion

• takes place in a straight line or curved path

• takes place around an axis or circle

• takes place in a line graph

• takes the shape of a sprinter rotating their hips

Angular Motion

• commonly referred to as rotation occurs when a body moves along a circular path at the same angle in the same direction, at the same time

• commonly referred to as rotation occurs when a body moves along a circular path at a different angle in the same direction, at a different time

• Is motion that occurs linearly along a horizontal flight path

• Is motion that occurs linearly along a vertical flight path

Torque

• If two equal eccentric forces are applied in two opposing directions the the object will rotate

• If two equal eccentric forces are applied in the same direction the the object will rotate

• Newtons third law of action reaction if the object receives a force on the left it will move left

• Newtons third law of action reaction if the object receives a force on the left it will move right

Moment of Inertia

• is the products of how much time force is applied for and mass the object has

• is the product of law of acceleration and diminishing returns

• is the product of the distribution of the mass of the object and the axis which it rotates

• tells us the difference in how much rotation can influence the angular velocity

Moment of Inertia

• mass x radius (squared)

• mass x force (squared)

• force x radius (squared)

• time x radius (squared)

Moment of Inertia

• An object that has its mass located closer towards the axis of rotation is much harder to rotate than one whose mass is located further away from the axis

• An object that has its mass located further away from the axis of rotation is much harder to rotate than one whose mass is located further away from the axis

• An object that has its mass located further away from the axis of rotation is much easier to rotate than one whose mass is located further away from the axis

• An object that has its mass located closer towards the axis of rotation is much easier to rotate than one whose mass is located further away from the axis

Newton’s First Law of Motion

• The higher the mass of a body the greater the inertia and therefore less force is required to overcome this inertia

• The higher the mass of a body the greater the inertia and therefore more force is required to overcome this inertia

• The lower the mass of a body the greater the inertia and therefore more force is required to overcome this inertia

• The lower the mass of a body the greater the inertia and therefore less force is required to overcome this inertia

Newton’s Second Law of Motion

• A force applied to an object will produce a change in motion (acceleration) in the direction of the applied force that is directly proportional to the size of the force

• A force applied to an object will produce a change in motion (acceleration) in the opposite direction of the applied force that is directly proportional to the size of the force

Newton’s Second Law of Motion

• Force = Mass x Acceleration

• Force = Momentum x Acceleration

• Force = Mass x Momentum

• Speed = Mass x Acceleration

Newton’s Third Law of Motion

• For every action, there is an equal and opposite reaction

• For every action, there is an opposite reaction

• For every reaction, there is an equal reaction

• For every moment of inertia there is an opposite reaction