# hw1 - kveton(ajk643 – hw1 – morrison –(60620 1 This...

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Unformatted text preview: kveton (ajk643) – hw1 – morrison – (60620) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points This problem shows how dimensional analysis helps us check and sometimes even find a formula. A rope has a cross section A = 10 m 2 and density ρ = 2040 kg / m 3 . The “linear” density of the rope μ , defined to be the mass per unit length, can be written in the form μ = ρ x A y . Based on dimensional analysis, determine the powers x and y by choosing an expression below. 1. μ = A 2 ρ 2. μ = 1 ρ A 3. μ = ρ A 4. μ = 1 ρ A 2 5. μ = A 2 ρ 2 6. μ = A ρ 7. μ = A ρ 2 8. μ = ρ A 2 9. μ = ρ A 2 10. μ = ρ A 002 10.0 points The volume of an object is given as a function of time by V = A + B t + C t 4 . Determine the dimension of the constant C. 1. L/T 4 2. L 3 /T 4 3. L 4 /T 3 4. L/T 5. L 2 /T 4 003 10.0 points A metric ton is 1 . 000 × 10 3 kg. How many 82 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? Answer in units of people. 004 (part 1 of 2) 10.0 points The Statue of Liberty weighs nearly 205 tons. If a person can pull an average of 80 kg / person, how many people would it take to move the Statue of Liberty? Answer in units of people....
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hw1 - kveton(ajk643 – hw1 – morrison –(60620 1 This...

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