Stretching Flashcards
(17 cards)
What is the definition of extension in a material?
The difference between the stretched length and the unstretched length.
What does it mean for a material to obey Hooke’s Law?
Its extension is directly proportional to the force applied to it.
What is the formula for Hooke’s Law?
F = k × e
What happens when the limit of proportionality is exceeded?
Hooke’s Law is no longer obeyed.
What does a force-extension graph look like when Hooke’s Law is obeyed?
A straight line through the origin.
What occurs when a force stretches or compresses a spring?
Work is done and energy is transferred to the elastic potential store of the spring.
What is the relationship between work done on a spring and elastic potential energy stored?
They are equal, provided the limit of proportionality is not exceeded.
What is the formula for elastic potential energy stored in a spring?
Ee = ½ k x e²
How is the elastic potential energy stored represented on a graph?
By the area under a force-extension graph.
What does it mean for a material to behave elastically?
It returns to its original shape when forces are removed.
What does it mean for a material to behave inelastically?
It does not return to its original shape when forces are removed.
Fill in the blank: The process of collecting data to find the ______ involves measuring the original length with a _______.
spring constant
ruler
What tool is suggested to ensure the ruler is vertical during measurements?
A set square.
What should you do to read the ruler accurately?
Read with your eyes perpendicular to the scale.
What is the first step in the practical method for finding the spring constant?
Measure the original length with a ruler.
What is the maximum applied force to use in the practical method for finding the spring constant?
12N.
What is the calculation to determine extension?
Stretched length - original length.
