P5 - Forces and elasticity Flashcards
1
Q
Explain the relationship between the force applied and the extension of an elastic object.
A
The extension is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.
2
Q
What is meant by an inelastic (plastic)
deformation?
A
● A deformation which results in the
object being permanently stretched
● The object doesn’t return to its original
shape when the force is removed
3
Q
State the equation relating force, spring
constant and extension. Give appropriate
units.
A
Force = Spring Constant x Extension
Force (N), Spring Constant (N/m)
Extension (m)
4
Q
What type of energy is stored in a spring
when it is stretched?
A
Elastic potential energy.
5
Q
What can extension be replaced with in
the equation for spring force?
A
Compression.
