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PHYS171exampleexam1

# PHYS171exampleexam1 - PHYS171 Name Exam 1 Fall 2010 Student...

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PHYS171 Exam 1 Fall 2010 Name: _____________________ Student ID #: ________ Short Answer Questions 1) Sketch a graph of position vs time, velocity vs. time and acceleration vs. time. for a car that has constant acceleration of 2 m/s 2 for 5 seconds as it accelerates from a stop, then continues at constant velocity of 10 m/s for 5 seconds . Axes should be labeled with correct units and correct values when possible. (5 points) 2) A particle at the origin ( j i ˆ 0 ˆ 0 + ) reaches a position ( j i ˆ 5 ˆ 3 + ) after 10 seconds. What is the average velocity direction and magnitude. Express direction as angle with the positive x axis. (5 points) 3) You are riding in a train car that is accelerating at constant rate as it leaves the station. You face forward and throw a ball up vertically in the air. Which is true? It (a) might land on the passenger in front of you, (b) might land on the passenger behind you, (c) will fall right back into your hand. (5 points) 4) A ball has radius 0.1m with uncertainty 0.01m. Given that the volume of a sphere is 3 3 4 r π find the volume of the sphere and the uncertainty in the volume of the sphere. (10 points)

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PHYS171exampleexam1 - PHYS171 Name Exam 1 Fall 2010 Student...

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