# PHYS 100 Midterm I

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Page 1 of 8 Version 1 PHYS 100 Midterm 1, October 5, 2007 Last Name________________________________ First Name________________________________ Student ID________________________________ Signature_________________________________ INSTRUCTIONS ***READ CAREFULLY*** ****Only Aurex scientific calculators are allowed **** **** Students must have their photo ID clearly visible on the desk during the test.**** ****Use pen rather than pencil. (Regrades will not be considered for tests done in pencil) Note: It is very important that you clearly show your reasoning. You can use the back side of the sheets for rough work, if necessary Useful information: g=9.8 m/s2 Constant acceleration (only x components only are shown) 1 a x t 2 2 v f  vi  at , x  vix t  v f  vi  2ax 2 2 1 Page 2 of 8 Version 1 Marks Summary: Q1 Marks 2 Max Q2 Q3 Q4 Q5 Q6 Q7 Q8 Total Question 1 (2 marks) . 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 shown here best represents the velocity of the stone as a function of time? (a) (b) (c) (d) (e) Circle one answer: (a) (b) (c) (d) (e) 2 Page 3 of 8 Version 1 Question 2 (6 marks) An object is initially at rest. It then accelerates at 2m/s2 for 5 s. It then continues at constant velocity for 5 s. It then decelerates at -5 m/s2 until coming to rest. (a) Sketch the velocity time graph for this situation from start to finish Velocity (m/s) 20 18 ...
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