Unit 1; Engineering Principles
What is the principle of the conservation of energy? - Energy cannot be created or destroyed, only
transferred from one form into another.
What is the unit of energy? - Joule
In words, work is... - The measure of energy transfer that occurs when an object is moved over a
distance by an external force.
What is the unit of work? - Newton metre (N/m) or Joule (J)
Word equation: work done = ... - Force multiplied by distance
Work done is the change in... - Energy
Power is... - The rate of doing work
power =... - Work done over time
scalar quantity - a quantity that can be described by magnitude only and has no direction
A vector quantity - A quantity with a magnitude and direction
What is a resultant force? - The vector sum of all the individual forces acting on an object.
The equilibrium force has the same magnitude but... - Opposite direction to the resultant force
What is displacement? - A distance in a given direction.
