Units
Energy
Forces
Materials
Misc
100
What units do we use in engineering for length?
mm (millimetres)
100
An object at a height has what kind of energy?
Gravitational potential energy
100
What is a force?
A push or a pull
100
Which material property relates to the mass of the part?
Density.
100
Who is this?
Isaac Newton
200
How many millimetres are there in a centimetre?
10
200
What units is energy measured in?
Joules (J)
200
What is Newton's second law?
F=ma
200
What are the four categories of materials?
- Metals and alloys
- Plastics and elastomers
- Glasses and ceramics
- Composites
200
This is the flag of which country?
Belgium
300
What units can material strength be measured in?
GPa or MPa
300
A 2250 kg car is travelling at a speed of 10 m/s. Determine its kinetic energy.
KE=1/2 mv^2
KE=1/2 2250 * 10^2
KE=112500 J
300
What is Newton's third law?
Every action has an equal and opposite reaction
300
Which material category is typically strongest?
Ceramics
300
This is the flag of which country?
Turkey
400
What units can density be measured in?
kg/m3 OR g/cm3
400
Which energy transformation occurs as a trebuchet fires?
GPE of the counterweight is converted into KE of the projectile.
400
What is Newton's first law?
An object's velocity won't change unless acted upon by an external unbalanced force
400
What material properties measure the strength of the material?
- Tensile strength
- Compressive strength
- Ultimate strength
- Yield strength
400
What is this and what engineering principle does it demonstrate?
Woomera (spear-thrower)
Leverage
500
What does GPa stand for?
Giga pascals
500
Which energy transformation occurs during projectile motion?
KE to GPE as the projectile increases in height. Then GPE to KE as it falls back down.
500
What units are forces measured in?
Newtons (N)
500
What is material hardness?
Resistance to scratching or indentation.
500
Who are these people?
David and Goliath