Forces and elasticity Flashcards
If an object in in equilibrium what has happened to the forces
They are balanced
What happens when u apply a force to something
It may s…, c… or b…
It may stretch, compress or bend
To stretch, compress of bend and object how many forces need to act on an object
More than 1
If an object can go back to its original shape it is
Elastically deformed
If an object can’t go back to its shape it’s
Inelastically deformed
Equation linking force, extension and spring constant
F=ke
What do force on y axis and extension on x axis graphs look like
There is a curve at the end
What is the limit of proportionality
Where there is a maximum force so that the extension is no longer proportional to the force
Practical to investigate springs and the link between force and extension
- Use a s…, f… r…, h… m…, w… s…, c… and e… m…
- Measure … length of …
->at … level, more … - Add … to spring, … the mass and new … of spring, e… is 🔺 in …
- … this process, … the masses
- Use … to find the force, and plot a …-… graph
->force on … axis, extension on … axis
- Use a spring, fixed ruler, hanging mass, weighted stand, clamps and extra masses
- Measure natural length of spring
->at eye level, more accurate - Add mass to spring, record the mass and new length of spring, extension is 🔺 in length
- Repeat this process, increasing the masses
- Use W=mg to find the force, and plot a force-extension graph
->force on y axis, extension on x axis
Equation linking spring constant, elastic potential energy and extension
E=0.5ke2
Every 0.5 Kids Evaporate Twice
When can u no longer use the equation E=0.5ke2 to find the work done
When the spring has been stretched past its limit of proportionality
