Biomechanics

Newton's first law is

• Law of inertia

• Law of accleration

• Law of action/reaction

Newton's 2nd law is

• Law of inertia

• Law of accleration

• Law of action/reaction

Newton's 3rd law is

• Law of inertia

• Law of accleration

• Law of action/reaction

Newton's 1st law states

• For every action there is an equal and opposite reaction. Forces always come in pairs - when one body exerts a force on a second body the second body exerts an equal force in the opposite direction

• The vector sum of forces (F) on an object is equal to mass (f) x acceleration.

  An increase in the velocity of the moving object is directly proportional to the force applied and inversely proportional to the object’s mass

• An object will remain at rest or in uniform motion in a straight line unless acted on by an external force

Newton's 2nd law states

• For every action there is an equal and opposite reaction. Forces always come in pairs - when one body exerts a force on a second body the second body exerts an equal force in the opposite direction

• The vector sum of forces (F) on an object is equal to mass (f) x acceleration.

  An increase in the velocity of the moving object is directly proportional to the force applied and inversely proportional to the object’s mass

• An object will remain at rest or in uniform motion in a straight line unless acted on by an external force

Newton's 3rd law states

• For every action there is an equal and opposite reaction. Forces always come in pairs - when one body exerts a force on a second body the second body exerts an equal force in the opposite direction

• The vector sum of forces (F) on an object is equal to mass (f) x acceleration.

  An increase in the velocity of the moving object is directly proportional to the force applied and inversely proportional to the object’s mass

• An object will remain at rest or in uniform motion in a straight line unless acted on by an external force

The average speed of a 100m runner completing the race in 10 seconds is,,,,

the calculation of acceleration is....

• (final velocity - initial velocity) divide speed

• (final velocity - initial velocity) divide time

• (initial velocity - final velocity) divide time

• distance divide time

Calculate the force of a 80 kg rugby player running at speed of 8m/s

• 10N

• 640N

• 6400N

• 640

Factors affecting horizontal displacement are....

• Gravity

  Lift force

  Air resistance

• speed of release

  height of release

  Velocity of release

• Speed of release, height of release, angle of release

• velocity, drag force, mass, streamlining, surface characteristics, lift