Forces And Elasticity Flashcards
What must an object do if it is to be defined as an elastic object?
It must return to its original shape after a force which caused it to change in shape has been removed
How is energy stored as elastic potential energy by an Elster object?
Work is done by an elastic object when it is changed in shape and this energy isn’t lost but is stored as elastic potential energy
How is elastic potential energy converted back into kinetic energy?
When an elastic object returns to its original shape the elastic potential energy is converted back into kinetic energy as the force holding the object in its changed shape is removed
What is the connection between the extension of an elastic object and the force applied to it?
The extension and force are directly proportional
What is extension measured in?
Metres
What is the equation linking force, extension and spring constant?
Force = spring constant x extension
What is the spring constant of a material?
How many newtons it takes to stretch the material a metre (measured in N/m)
What is the limit of proportionality?
The point at which the force becomes too great for the extension to increase in direct proportion to the force exerted on the object
What happens when work is done by an elastic object?
The energy is stored as elastic potential energy
