Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
13 Cards in this Set
- Front
- Back
|
Density |
Mass per unit volume (m/v) |
|
|
Pressure |
Normal force acting per unit cross-sectional area. |
|
|
Factors for pressure |
- Depth - Density - Acceleration due to gravity. |
|
|
Compressive Forces |
Squash and shorten a spring. |
|
|
Tensile Forces |
Stretch a spring |
|
|
Stiffness |
Force against extension graph can be plotted. |
|
|
Force Constanr |
- Gradient is known as the force constant - F=kx - Stiffer the spring, greater the value of k - Only applicable while graph is straight |
|
|
Hooke's Law |
A material obeys Hooke's law if the extension produced is in proportional to the applied forve (load) |
|
|
Elastic limit |
Springs are normally elastic. The force beyond which the spring becomes permanently deformed is known as the elastic limit. |
|
|
Strain |
Fractional increase in the original length. (x/l) |
|
|
Stress |
Force applied per unit cross-sectional area. |
|
|
Young modulus |
Ratio of stress to strain gives stiffness or young modulus Only the linear section of the graph obeys this. |
|
|
Elastic potential energy |
When a solid has been strained elastically, but the elastic limit has not been exceeded it is said to have elastic potential energy. EPE= 0.5kx square |
