OTHER KNOWLEDGE Flashcards
What is terminal velocity?
When the weight forces of an object are balanced with the air resistance forces and therefore the object reaches a steady speed.
How do you calculate the resultant force of a two plane object?
Pythagoras or scale drawing.
What is an elastic material?
A material that will return to its original shape and length
What is a plastic material?
A material that will not return to its original shape and length.
What is the elastic limit?
The force applied where an object goes from elastic to plastic.
What is the permanent set?
The difference between the new and original length.
What is a moment?
A turning force.
What is the unit for moments?
Ncm/Nm
What does it mean if a system is in equilibrium?
When the moments are balanced.
How do you find the centre of mass of a symmetrical object?
Trace lines of symmetry to where they meet
