Module 3: Forces and Motion Definitions

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AS - Level Physics Flashcards on Module 3: Forces and Motion Definitions, created by Jasmine Yap on 09/05/2016.
Jasmine Yap
Flashcards by Jasmine Yap, updated more than 1 year ago
Jasmine Yap
Created by Jasmine Yap almost 8 years ago
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Resource summary

Question Answer
Normal Contact Force A force perpendicular to the surface experienced by a body when it is in physical contact with something else.
Hooke's Law Within the limit of proportionality, the extension produced in a material (x) is directly proportional to the force applied (F). F=kx.
Principle of Moments When an object is in equilibrium, the sum of anticlockwise moments about any point equals the sum of clockwise moments about the same point and there is no resultant force.
Archimedes’ Principle The upthrust experienced by an object partially or entirely immersed in a fluid is equal to the weight of the fluid displaced by the object.
Newton's First Law of Motion A body will continue in its state of rest or uniform motion in a straight line unless an external resultant force acts on it.
Newton's Second Law of Motion The rate of change of momentum of a body is proportional to the resultant force (F) acting on it and the change takes place in the direction of the force, where F=ma or F=∆p/∆t.
Netwon's Third Law of Motion If body A exerts a force on body B, then body B exerts a force of equal magnitude but in the opposite direction on body A.
Principle of Conservation of Momentum The total momentum of a system of objects remains constant provided no resultant external force acts on the system.
Work Mechanical transfer of energy to a system or from a system by an external force on it. W=Fd (W=work in J, F=force in N, d=distance moved by object in m).
Power Rate of work done or energy converted (W) with respect to time (t). P=W/t.
Speed Rate of change of distance traveled with respect to time. (s=d/t)
Velocity Rate of change of its displacement with respect to time.
Acceleration Rate of change of its velocity with respect to time.
Reaction time Time it takes between when the hazard is seen and the response is detected.
Thinking distance
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