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BCGBC4010A Apply structural principles to
residential low-rise constructions
Structural principles - Forces
Topic activity
Question 1 of 8
Which of the following statements is true for Newton's laws of motion?
A.
A body in motion will eventually stop
B.
A force is caused by articulation
C.
Action and reaction are equal but opposite in direction
D.
All of the above
E.
None of the above
The correct answer is C - Action and reaction are equal but opposite in direction.
Question 2 of 8
What properties does a force have?
A.
Position
B.
Direction
C.
Magnitude
D.
All of the above
E.
None of the above
The correct answer is D - All of the above. Forces can be represented by vectors
which have these properties.
Question 3 of 8
A 40 kilogram bag of cement will exert how much force on a pallet upon which it is
stacked?
A.
4N
B.
40 N
C.
400 N
D.
4 kN
E.
40 kN
The correct answer is C - 400 N. If a 1 kg mass produces a force of 10 N, then a 40
kg mass will produce a force of 40 x 10 = 400 N.
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Question 4 of 8
How much mass is required to produce a force of 250 kN?
A.
250,000 kg
B.
25,000 kg
C.
2,500 kg
D.
250 kg
E.
25 kg
The correct answer is B - 25,000 kg. Given that a force of 10 N is produced from a 1
kg mass and 250 kN = 250,000 N, then 250,000 divided by 10 gives the answer of
25,000 kg.
Question 5 of 8
Which of the following statements are true for a structure in equilibrium?
A.
 Fv = 0
B.
 Fh = 0
C.
M=0
D.
None of the above
E.
All of the above
The correct answer is E - All of the above. All of these equations are true if the
system is to remain in equilibrium.
Question 6 of 8
What is the force due to gravity on a 1 kg object?
A.
9.8 N
B.
9.8 kN
C.
98 N
D.
98 kN
E.
981 N
The correct answer is A - 9.8 N. The force due to gravity is 9.8 N.
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Question 7 of 8
What is the most common unit used to measure stress in structural materials?
A.
Pa
B.
kPa
C.
MPa
D.
N
E.
kN
The correct answer is C - MPa. Both Pa and kPa are too small, and newtons (N) are
not the units used for measuring stress.
Question 8 of 8
Newton's second law is represented by which equation?
A.
a=fxm
B.
m=fxa
C.
acceleration = force x mass
D.
force = mass ÷ acceleration
E.
f=mxa
The correct answer is E - f = m x a which is Newton’s second law of motion.
If you would like more information about any of these questions, talk to your trainer.
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