Physics

Descripción

Motion and Energy
Sonja Arnold
Fichas por Sonja Arnold, actualizado hace más de 1 año
Sonja Arnold
Creado por Sonja Arnold hace más de 10 años
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Resumen del Recurso

Pregunta Respuesta
Potential Energy Stored Energy waiting to be used later E.g. Battery
Gravitational Potential Energy Ep =mass x gravity x height =mgh
Elastic Potential Energy Due to compression or expansion of an elastic object E.g. Rubber band
Chemical Potential Energy Stored within chemical bonds
Kinetic Energy Energy an object has due to its motion Ek=1/2 (mass x speed2)
Work Work Done = Force x Distance
Power Work Done Power= _______________ Time
Newton's First Law - An object at rest will remain the same unless acted upon by a force. - An object that is moving will continue to move at the same speed and in the same direction unless an unbalanced force acts upon it.
Newton's Second Law An object will accelerate in the direction of an unbalanced force acting upon it such that: F = m x a
Newton's Third Law For every action, there is an equal and opposite reaction
Inertia The movement of an object to resist changes in its motion
Displacement Straight line distance between the finishing and starting points
Scalar Quantity Has size but not a direction E.g. 7m
Vector Quantity Has both a size and a direction E.g. 7m West
Velocity Is the rate at which displacement changes; Speed
Gradient Line with a steep slop
Acceleration The rate of change in velocity
Acceleration Formula Average Accel. = change in speed ________________ time a = v - u _____ t
Final Speed Formula v = u + at
Acceleration due to gravity g= 10 or 9.8
Average Speed Formula v = d _____ t
Distance Formula d = v x t
Distance vs Time Graph
Displacement vs Time Graphs
Speed vs Time Graphs
Ticker Timers It consists of a small electric arm with a pin or hammer on its end. The hammer vibrates up and down 50 times per second, synchronised with the alternating current of 50 Hz supplying its power. The hammer hits a piece of carbon paper that leaves a dot on a strip of paper threaded below it. When the timer is attached to an object moving in a straight line, these dots are a record of its motion
Fundamental Quantities Measured; Displacement, Mass, Length & Time
Derived Quantities Calculated; Velocity, Acceleration & Force
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