Mechanics

Question 1

Breaking stress Def

Answer 1

The maximum stress that an object can withstand before failure occurs.

Question 2

Brittle def

Answer 2

Will show very little strain before reaching it’s breaking stress

Question 3

Centre of mass Def

Answer 3

The point on a body where the whole mass can be considered to be concentrated/said to act.

Question 4

Couple def

Answer 4

Two equal and opposite parallel forces that act on an object at different points and has the effect of causing rotation without translation.

Question 5

Elastic behaviour def

Answer 5

If a material deforms it will return to its original shape when the forces are removed. (Before material reaches elastic limit)

Question 6

Elastic strain energy

Answer 6

The energy stored in an object when it is stretched.

Question 7

Stiffness def

Answer 7

How difficult it is to stretch a five object

Question 8

Terminal speed def

Answer 8

The max speed of an object that occurs when the resistive and driving forces acting on the object are equal to each other.