Elasticity Springs and moments Flashcards
What 3 things can you do when you apply a force to an object
And how many forces do u need for this to happen
Stretch
Compress
Bend
At least 2 forces
When is work done on an object
When a force stretches or compressed the object and causes energy to be transferred to its elastic potential energy store
What is elastic deformation
When a object can go back to its original form after a force has been removed
How are force and extension related
They are directly proportional
What is the equation for extension
Spring constant / force
Is there a limit for the extension to keep increasing proportionally
Yes there is a maximum force that can be applied
What is limit of proportionality
The maximum force that can be applied to an object for the extension to keep increasing proportionally
What is the equation for elastic potential energy
1/2 x spring constant x extension (squared)
What is the turning affect of a force called
A moment
How do you find the side of a moment on an object
Force x distance
What’s an example of a force causing a moment on an object
The force on a spanner causes a moment on a nut
How do you get maximum moments
Push at right angles to the pivot
What do levels do
Increase the distance from the pivot at which the force is applied
And make it easier to do work
What are gears
They are circular discs that have teeth whiixh interlock so that turning one causes the other to turn in the opposite direction
What are gears used for
To transmit the rotational effect of a force from one place to another
