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WAPhysical EducationQuick questions
Unit 3: Factors Affecting Performance
Quick questions on Momentum and impulse: WACE Physical Education Studies Unit 3
2short 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 momentum?Show answer
Momentum is the quantity of motion a body has, calculated as mass times velocity. Because an athlete's mass is essentially fixed during a skill, momentum is changed by changing velocity. A heavier, faster rugby player carries more momentum and is harder to stop than a lighter, slower one.
What is impulse?Show answer
Impulse is the force applied multiplied by the time over which it acts. The impulse momentum relationship states that the impulse applied to a body equals its change in momentum. This single relationship explains both generating and absorbing force, because it can be read two ways: a force over a time produces a velocity change, and a required velocity change can be spread over a longer time to reduce the force.
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