Physics Unit 1 Definitions

Pregunta	Respuesta
Define Scalar Quantitiy	It is one that has A magnitude but not a direction
Define Vector Quantitiy	It is one that has a Magnitude and Direction
Define Speed	It is Distance per unit time
Define Displacement	It is distance moved in a stated direction
Define Velocity	It is the displacement per unit time, or change in displacement/time
Define Acceleration	Is the rate of change of Velocity
Define The Newton	It is the force required to accelerate a 1 Kg object at 1 \(MS^-2\)
Define The Moment of a Force	It is the force multiplied by the perpendicular distance from a stated point (or pivot)
Define Couple	Is a pair of equal and parallel but opposite forces, which tend to produce rotation only
Define Density	It is Mass per unit Volume
Define Pressure	It is force per unit area
Define The Joule	It is the work done when a force of 1 Newton moves it's point of application 1 Metre in the direction of the force
Define The Conservation of Energy	It is in any closed system, energy may be converted from one form to another but cannot be created or destroyed
Define Energy	Is is the stored ability to do work
Define Gravitational Potential Energy	It is the energy stored in an object due to it's position in a gravitational field
Define Kinetic Energy	It is the work an object can do because of it's speed
Define Power	Power is the rate of doing work
Define the Watt	The Watt is equal to one Joule per Second
Define Stress	Stress is force per unit cross-sectional area
Define Strain	Is Extension per unit length
What does a Stress/Strain graph look like for a: Ductile Material	Image: 6ad7cc29-c306-437e-9869-dd61b7cbe8c2 (image/png)
What does a Stress/Strain graph look like for a: Brittle Material	Image: 77d8949f-c188-4216-b8c7-3d44c528d184 (image/png)
What does a Stress/Strain graph look like for a: Polymeric Material	Image: a5faef04-1277-41d3-8467-5a99b537f9a4 (image/png)

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