Biomechanics – Part 2

All will be able to:•State and explain the factors that effect projectile motion•Explain angular motion including the conservation of angular momentum and the relationship between the moment of inertia and angular velocitySome will also be able to: •Apply this knowledge to exam questions

Learning Outcomes are:

Projectile motion:Angle of releaseParabolic curve

Horizontal componentVertical component

Height of releaseSpeed of release

Angular motion:Footfall

Negative impulsePositive impulse

Zero impulse(Force time graphs to

show acceleration, deceleration and constant velocity)

Define the following terms and give an equation or applied example as applicable:

Angular velocity, angular acceleration, angular momentumMoment of inertia, angular, moment, moment arm, resistance arm

Effort arm, principle of moments, angular movementConservation of angular movement

Radian, relationship between moment of inertia and angular velocity

The final stage of an endurance race often involves a sprint finish.05 Using Newton’s Second Law of Motion, explain how an athlete is able to accelerate towards the finish line. (3 marks)

Explain how a gymnast can alter the speed of rotation during flight (7)

Using ‘Newton’s First’ and ‘Second Laws of Motion’, explain how

the swimmer dives off the starting blocks. (4

marks)