Statics - Questions Flashcards
What are some examples of scalar quantities?
- area
- volume
- mass
- density
- temperature
Give some examples of vector quantities
- velocity
- acceleration
- force
- momentum
- displacement
What are the two ways to work out resultant force where the vectors are not opposite each other?
The parallelogram method and the triangle method
What is the meaning of centre of gravity?
The point about which a body is perfectly balanced
How do you convert weight to Newton’s?
Weight (kg) x 9.81
What are the five stresses and strains?
Tensile Compressive Torsion Shear Bending
What is the other terminology for tensile stress?
Axial or normal stress
What are the units of stress?
Lb/in^2 or N/m^2
What is the unit of strain?
There are no units
Where on the stress stain graph does hookes law apply?
In the linear/elastic region
What is the usual material for the outer shell of aircraft?
Aluminium
What are the two things that make up bending?
Tension and compression
Where is the greatest stress found on a cantilever?
At the root
On a cantilever how is the shear stress distributed throughout the beam?
Shear stress is constant along the beam
What are the two stresses involved in torsion?
Compression stress and tension stress
