Exam1_2011_Winter

# Exam1_2011_Winter - Physics 140 Winter 2011 First Midterm...

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Physics 140, Winter 2011, Midterm 1 Problem 1: The value of ( 29 i k j × % % % is: A. zero B. +1 C. –1 D. 3 E. 3 Problem 2: Figure shows a 10 kg mass suspended from two spring scales, each of which has negligible weight. Thus, A. Each scale will read 5 kg. B. The top scale will read zero, the lower scale will read 10 kg. C. The lower scale will read zero, the top scale will read 10 kg. D. Each scale will read between 1 kg and 10 kg, such that the two add to 10 kg. E. None of the above. 10kg
Problem 3: A child standing on a bridge throws a rock straight down. The rock leaves the child’s hand at t = 0. Which of the graphs best represents the velocity of the stone as a function of time? Neglect air resistance. Problem 4: Three boxes with mass m 1 = 1kg, m 2 = 2kg, and m 3 = 3kg are hanging from strings as shown in figure. You are pulling the top string with the force of 100N. What is the tension T 12 in the string connecting boxes m 1 and m 2 ? 0

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Exam1_2011_Winter - Physics 140 Winter 2011 First Midterm...

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