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AN#Sci#2011#2#NLOM
Science Topic 2 Newton's Laws of Motion 2011
Question | Answer |
---|---|
Newton's First Law (definition) | Law of inertia: An object will remain at rest or will not change its speed unless it is acted upon by an outside, unbalanced force |
Newton's Second Law (definition) | F=ma: Describes how the mass of an object affects the way that it moves when acted upon by one or more forces |
Newton's Third Law (definition) | Action/reaction: For every action there is an equal and opposite force |
Law of inertia (example) | Seatbelts keep passengers moving with the vehicle to prevent the law of inertia |
F=ma (example) | As a rocket accellorates, it loses mass but retains the same force thus increasing its accelleration |
Action/reaction (example) | Our weight on the floor (downwards) is countered by the upward force of the floor, otherwise we would fall through |