DYNAMICS OF STRUCTURES COMPREHENSIVE
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ Newton.
Answer: a unit for measuring force; 1 N equals the amount of force
needed to hold up a mass of 100 g
◉ external force.
Answer: a force applied to an object by something else; for example,
a person sitting on a chair
◉ mass.
Answer: the amount of matter in an object; usually measured in
grams and kilograms
◉ centre of gravity.
Answer: an imaginary point in an object where the downward force
of gravity acts; for example, the point at which a pencil can balance
on your finger
◉ symmetry.
, Answer: a balanced arrangement of mass on opposite sides of a line
or plane, or around a centre or axis
◉ load.
Answer: an external force acting on an object; can be measured as
weight
◉ dead load.
Answer: the weight of the structure itself
◉ live load.
Answer: a moving or changing force acting on an object
◉ beam bridge.
Answer: a bridge supported by a beam or several beams; the most
common type of bridge; the 11th Street bridges in Washington, DC
are this type of bridge
◉ truss bridge.
Answer: a bridge supported by trusses; the Tom Uglys Bridge in
Sydney, Australia is this type of bridge
◉ suspension bridge.
SOLVED QUESTIONS AND COMPLETE
ANSWERS
◉ Newton.
Answer: a unit for measuring force; 1 N equals the amount of force
needed to hold up a mass of 100 g
◉ external force.
Answer: a force applied to an object by something else; for example,
a person sitting on a chair
◉ mass.
Answer: the amount of matter in an object; usually measured in
grams and kilograms
◉ centre of gravity.
Answer: an imaginary point in an object where the downward force
of gravity acts; for example, the point at which a pencil can balance
on your finger
◉ symmetry.
, Answer: a balanced arrangement of mass on opposite sides of a line
or plane, or around a centre or axis
◉ load.
Answer: an external force acting on an object; can be measured as
weight
◉ dead load.
Answer: the weight of the structure itself
◉ live load.
Answer: a moving or changing force acting on an object
◉ beam bridge.
Answer: a bridge supported by a beam or several beams; the most
common type of bridge; the 11th Street bridges in Washington, DC
are this type of bridge
◉ truss bridge.
Answer: a bridge supported by trusses; the Tom Uglys Bridge in
Sydney, Australia is this type of bridge
◉ suspension bridge.
