WorksheetsForces Acting on Structures & Mechanisms
Total questions: 20
Worksheet time: 10mins
What is a force?
A push or a pull that causes an object to change its movement or shape.
A push or twist that causes an object to change its movement or
Something from Star Wars
A push that causes an object to change its movement or shape.
What are complex machines?
Machines that are really difficult to understand.
Two or more simple machines working in unison.
One machine that does many different things.
What is a static load?
A load that causes static electricity
A moving load
A non-moving load
What is a dynamic load?
A moving load
A non-moving load
A load that is always changing
Compression is a force that ________
squeezes material together
twists materials
pulls materials
rips materials
What type of force is torsion?
Twisting
Pushing
Ripping
Pulling
What type of force is shear?
Twisting
Pulling
Ripping
Pushing
What is the purpose of simple machines?
To make it harder to move a load.
To make easier work more difficult.
To make it easier to move a load.
Gravity is a force that is caused by the Earth pulling objects towards its centre?
True
False
Tension is a twisting force?
True
False
The size, direction and the location of where the force is applied are all factors that can effect a structure.
True
False
External forces such as extreme weather pose a constant threat to the structural reliability of structures.
True
False
How does a structure maintain structural reliability?
When the internal forces of a structure are greater than the external force
When the external forces of a structure are greater than the internal force
When the structure is there for you when you need it most.
The two main types of forces are static and dynamic.
True
False
Internal forces resist the external forces acting on a structure.
True
False
The following are all examples of internal forces except...
Compression
Tornado
Tension
Shear
An axe is an example of which simple machine?
Inclined plane
Lever
Wedge
All of the above
A third class lever...
has the fulcrum between the load and the effort
has the load between the fulcrum and the effort
has the effort between the fulcrum and the load
None of the above
What is the formula for calculating the Mechanical Advantage of a lever system?
MA = Effort Arm Length ÷ Resistance Arm Length
MA = Resistance Arm Length ÷ Effort Arm Length
MA = MC2
MA = time it takes to move something ÷ distance it has been moved
Scissors are an example of what kind of lever class?
First class
Second class
Third class
