Forces and Elasticity Flashcards
What changes of shape can happen due to force
Bending, pulling and pushing
What is a change in shape called?
Deformation
What is elastic deformation?
When the shape CAN return to its original shape after force is removed
What is inelastic deformation
When the shape CANT return to its original shape after the force is moved
What is hookes law and its equation?
The size of the deformation is directly proportional to the deforming load or force
F=ke
What is the limit of proportionality
Point where hookes law is no longer true when stretching a material
What is the spring constant?
Measure of the stiffness of a spring to the limit of its proportionality
What happens if the spring constant is high?
The spring is stiffer
What is the relation between force and exsention?
Force applied is directly proportional to extension
What is elastic limit?
Furthest point a material can be stretched, WHILST being able to return to original shape
What happens when an object is stretched past elastic limit?
It cant return to its original shape and is INELASTIC
Where does non linear(not directly proportional) extension occur?
Clay or putty
What does a force-extension graph look like?
A straight line upwards until is flattens because its past the limit of proportionality so its turned inelastic
Explain the force and extension practical in a spring
1)Secure clamp to bench with a G-clap stand
2)Attach two clamps to clamp stand
3)Attach spring to top clamp and ruler to bottom clamp
4)Make ruler vertical with zero at top of the spring
5)Record unloaded length of spring
6)Add masses on 100g at a time till it reaches 1000g and record
