Grade 5 Science Quiz - Forces Acting on Structures
Quiz by Arie Rosenberg
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The following are all examples of internal forces except...29
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The following are all examples of internal forces except...
The following are all examples of external forces except...
A structure is ready to be used in real life once...
none of the above
it has failed structurally
the structure has undergone repeated tests and passed each one.
the external forces acting on the structure overpower the internal forces30s
Which of the following is a simple machine?
all of the answers
An axe is an example of which simple machine?
A third class lever...
has the effort between the fulcrum and the load
has the load between fulcrum and the effort
none of the answers
has the fulcrum between the load and the effort30s
Which of the following is an example of a first class lever?
A pulley can be used to...
join two objects together
push two objects apart
move heavy loads long distances
change the direction that a force is applied.30s
The actual effect of a force on a structure depends on the magnitude, or size, of the force, the direction and the location where the force is applied.truefalseTrue or False30s
External forces such as extreme weather pose a constant threat to the structural reliability of structures.truefalseTrue or False30s
The two main types of forces are static and dynamic forces.falsetrueTrue or False30s
Internal forces resist the external forces acting on a structure.truefalseTrue or False30s
In order to maintain structural reliability the external forces must be greater than the internal forces.falsetrueTrue or False30s
A force is
a push or pull that causes an object to change its movement or shape.
two or more simple machines working in unison
a non-moving load.
a moving load.30s
Complex machines are
a squishing force that squeezes material together.
two or more simple machines working in unison.
always powered by electricity.
a moving load.30s
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