Elasticity

Why must more than one force be applied to change the shape of a stationary object?

Multiple forces are needed to create a net force that can change the shape without causing the object to move.

What is the unit of measurement for spring constant (k)?

N/,

What does the relationship between force and extension represent in elastic objects?

The extension of an elastic object is directly proportional to the force applied, within the limit of proportionality.

What is elastic potential energy?

work done to stretch or compress a spring, equal to the energy stored when the spring returns to its original shape.

What is the equation for calculating elastic potential energy (Ee)?

EPE = 1/2 × k × e^2, where EPE is elastic potential energy, k is the spring constant, and e is the extension.

How do you calculate the spring constant (k) in linear cases?

The spring constant can be calculated as k = F/e, where F is the force and e is the extension.

How is work done calculated when stretching a spring?

Work done can be calculated using the formula: Work = EPE = 1/2 × k × e^2.

How do you calculate stored energy in springs?

Stored energy in springs can be calculated using the equation EPE = 1/2 × k × e^2.

Plastic behaviour

Apply too much force to the spring and it permanently changes shape, doesn’t return to original shape when force is removed, it’s permanently deformed

Elastically deformed

Returns to original shape when force is removed

correlation between spring constant and extension

higher spring constant often leads to a stiffer spring so the extension will be lower