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QLDPhysical EducationQuick questions
Unit 1: Motor Learning, Functional Anatomy and Biomechanics in Physical Activity
Quick questions on Biomechanics for QCE Physical Education Unit 1
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is newton's First Law (inertia)?Show answer
An object at rest stays at rest, and an object in motion stays in motion at constant velocity, unless acted upon by a force.
What is newton's Second Law (force, mass, acceleration)?Show answer
The acceleration of an object is proportional to the net force acting on it and inversely proportional to its mass:
What is newton's Third Law (action-reaction)?Show answer
For every action there is an equal and opposite reaction.
What is first-class lever?Show answer
Fulcrum between effort and load. Example: the neck (atlanto-occipital joint as fulcrum, neck muscles as effort, skull as load).
What is second-class lever?Show answer
Load between fulcrum and effort. Example: a standing calf raise (ball of foot as fulcrum, body weight as load, calf muscle as effort).
What is third-class lever?Show answer
Effort between fulcrum and load. Example: a biceps curl (elbow as fulcrum, biceps as effort, weight in hand as load). Most human joints work as third-class levers.
What is sport application?Show answer
A stationary soccer ball stays at rest until kicked. A puck on ice continues moving across the rink because friction is low. A sprinter at the blocks does not move until they apply force to the blocks.
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