Forces and Elasticity Flashcards
Topic 5 - Forces
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 * 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
