P2.3.1 - Stretching Springs Flashcards
What can forces do to objects?
Compress
Stretch
Bend
How many forces do you need to compress, stretch or bend an object?
More than one
What are materials that stretch but do not return to their original shape called?
Plastic - They are deformed or distorted when you apply forces and stay that way when you remove the forces
What are elastics?
They return to their original shape when you remove the force
What does a graph of force against extension for a spring look like?
A straight line up to a certain point
What relationship do force and extension have up to a point and what is the point called?
They have a linear relationship until the limit of proportionality.
What is the elastic limit?
The point at which if you remove the force the object will return to its original shape. Above it and the object won’t
What happens if you double the force on a spring?
The extension doubles
What is Hooke’s Law?
The extension of a spring is proportional to the force until the limit of proportionality
What is the equation for a force on a spring?
Force exerted by a spring (N)
Spring constant(N/m) x Extension(m)
What is the spring constant?
The gradient of the linear section of the graph of force against extension.
Tell you how stiff the spring is
