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12/23/2016 The Expert TA | Human­like Grading, Automated! 1/11 Home | Student: [email protected] My Account Log Out Class Management | Help 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 AnswerFinalGrade1/2at)2,vΔt1/2at)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 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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12/23/2016 The Expert TA | Human­like Grading, Automated! 2/11 Submission Detail Answer Hints Feedback 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 t 0% 0% Note: Feedback provided here but not accessed during assignment. ma 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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