PHY 138 - Midterm 1 Review Sheet

# PHY 138 - Midterm 1 Review Sheet - Understand projectile...

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PHY 138 Review Sheet To successfully complete the first exam, you need to understand the following concepts and information: 1) Know the fundamental length, mass and time standards for the MKS, CGS, and English engineering systems. 2) Perform basic dimensional analysis to rapidly test the validity of a calculated result. 3) Convert between common sets of units. 4) Understand the relationship between accuracy and precision, and the way those concepts are expressed in significant digits. 5) Perform order of magnitude estimates. 6) Know the basis of Cartesian coordinates, cylindrical coordinates, and spherical coordinate systems. 7) Know the definitions of the following kinematic quantities: position, displacement, average velocity, instantaneous velocity, average acceleration, and instantaneous acceleration. 8) Know how to calculate the motions of objects in one dimension with constant acceleration. 9) Know how to resolve a vector into its components. 10)
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Unformatted text preview: Understand projectile motion. Know to calculate major parameters of its motion. For example: How long it takes to get to top of trajectory, the range at a given angle, the maximum height at a given initial velocity, etc. 11) Be able to perform variations of the homework problems. Examples of Problem Variations. Problem 2.44 (Original) – It is possible to shoot an arrow at a speed as high as 100 m/s. If friction is neglected, how high would an arrow launched at this speed rise if shot straight up? Problem 2.44 (Variation 1) – It is possible to shoot an arrow at a high speed. If friction is neglected, at what speed would an arrow need to be shot straight up if it rises to 500 m? Problem 2.44 (Variation 2) – You observe an arrow is shot straight up at a speed of 100 m/s and that it rises to 350 m. If friction is neglected, is the measured height consistent with the initial launch speed? 12) Do more problems than were assigned – you need practice....
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