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PHYS 1101002 (Online) HW 01_F15 (Intro)
Nafsi, Mohamed [email protected]
Problem 1:Answer the following questions using the following table of basequantities, derived quantities and units. Use dimensional analysis to guide yourthinking.Part (a)Using dimensional analysis, determine the units of the quantity Δt. Select the single best answer.
Correct Answer
Student Answer
Final
Grade
s
s
100%
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
Submission Detail
Answer
Hints
Feedback
Totals
1
s
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (b)Which of the following will have units of meters? Select all that apply.
Correct Answer
Student AnswerFinalGrade1/2a(Δt)2,vΔt1/2a(Δt)2,vΔt100%Student AnswerFinalGradeno –mahas units of kg•m/s2and 1/2mv2has units of kg•m2/s2no –mahas units of kg•m/s2and 1/2mv2has units of kg•m2/s2100%
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
Submission Detail
Answer
Hints
Feedback
Totals
1
1/2
a
(Δ
t
)
2
,
v
Δ
t
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (c)
Are the units of the formula
v
2
= 2
ar
dimensionally consistent? Select the single best answer.
Correct Answer
Student Answer
Final
Grade
yes – both
v
2
and 2
ar
have units of m
2
/s
2
yes – both
v
2
and 2
ar
have units of m
2
/s
2
100%
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
Submission Detail
Answer
Hints
Feedback
Totals
1
yes – both
v
2
and 2
ar
have units of m
2
/s
2
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (d)
Are the units of the formula
ma
=
mv
2
/2 dimensionally consistent? Select the single best answer.
Correct Answer
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
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Submission Detail
Answer
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Totals
1
no –
ma
has units of kg•m/s
2
and 1/2
mv
2
has units of kg•m
2
/s
2
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (e)Which of the following will have units of kg•m2/s2? Select all that apply.
Correct Answer
Student Answer
Final
Grade
mar
, 1/2
mv
2
mar
, 1/2
mv
2
100%
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
Submission Detail
Answer
Hints
Feedback
Totals
1
mar
,
ma
/Δ
t
0%
0%
Note: Feedback provided here but not accessed during assignment.
ma
/Δ
t
has the units of kg•m/s
3
0%
0%
2
mar
, 1/2
mv
2
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (f)
Given the formula
p
=
mv
, what are the units of
p
?
Correct Answer
Student Answer
Final
Grade
Units
p
= kg m/s
Units
p
= kg m/s
100%
Grade Detail
Correct
Student
Feedback
Final Answer Credit
100
%
Submission Detail
Answer
Hints
Feedback
Totals
1
Units
p
= kg m/s
0%
0%
0%
0%
Totals
0%
0%
0%
0%
Part (g)
Given the formula
F
=
ma
, what are the units of
F
?
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