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# PHY 2460 Exam 1 Review Sheet PHY 2460 - 02

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## Popular in Concepts in Physics for Middle Childhood Education

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This 9 page Study Guide was uploaded by Kristianna Notetaker on Tuesday September 13, 2016. The Study Guide belongs to PHY 2460 - 02 at Wright State University taught by Joseph Childers in Fall 2016. Since its upload, it has received 22 views. For similar materials see Concepts in Physics for Middle Childhood Education in Education, Physics at Wright State University.

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Date Created: 09/13/16

Exam #1 Review Sheet 1. What is physics? 2. Fill in the steps for the Scientific Method: 3. What is motion? 4. Define position. 5. What are the three essential components of a reference frame? a. b. c. 6. Explain the difference between a hypothesis and a prediction. 7. What is an index? 8. Define physical quantity. 9. What are units? 10.Give three examples of a physical quantity and its units. a. b. c. Remember, t represents time and x represents position. **POSITION IS NOT DISTANCE.** 11. What does delta (Δ) mean? Equations: a. Δt = b. Δx = 12.What is the equation used to find velocity? 13.What is the equation for speed? **DISPLACEMENT IS NOT DISTANCE** 14.What is an independent variable? a. b. 15.What is a dependent variable? a. b. 16.What is the difference between position, displacement, distance, and path length? a. Position: b. Displacement: c. Distance: d. Path length: 17.What is the equation used to find constant velocity? x(t) = 18.Use the following word phrases to determine which constant velocity equation to use: a. Position where; at what spot; how far b. Starting position; where was it; t = 0 c. How fast d. When; how long 19.Conversions a. Convert 25 miles into inches. b. Convert 9 months into seconds. (30.4 days in a month) c. Convert 5 m/s into mph. d. Convert 200 seconds into years. 20.What is the equation used to find average velocity? 21.What is the equation used to find average speed? Exam #1 Review Sheet Answers 1. What is physics? An experimental science. 2. Fill in the steps for the Scientific Method: OBSERVATION FIND A PATTERN BUILD ON HYPOTHESIS DEVELOP A HYPOTHESIS YES WAS THE PREDICTION MAKE A TESTABLE RIGHT OR WRONG? PREDICTION NO DO THE TEST REVISE OR REJECT IT 3. What is motion? Change in position over time 4. Define position. Location of an object relative to a chosen zero on the coordinate axis 5. What are the three essential components of a reference frame? a. origin b. coordinate axes c. time zero 6. Explain the difference between a hypothesis and a prediction. Hypothesis: explanation of some sort and is based on an underlying mechanism. Prediciton: uses “if… then,” is conditional, and is something you can test. 7. What is an index? Something per something else 8. Define physical quantity. Something in the world that can be observed and measured 9. What are units? How you describe that measurement 10.Give three examples of a physical quantity and its units. a. height: inches, centimeters, feet b. weight: kilograms, pounds, ounces c. distance: miles, kilometers, yards Remember, t represents time and x represents position. **POSITION IS NOT DISTANCE.** 11. What does delta (Δ) mean? “change in” or “interval Equations: a. Δt = t – t 2 1 - Change in time, time interval b. Δx = x 2– x 1 - change in position, “displacement” 12.What is the equation used to find velocity? Displacement/time = Δx/ Δt 13.What is the equation for speed? Distance/time = (dist)/ Δt **DISPLACEMENT IS NOT DISTANCE** 14.Independent variable? a. On horizontal axis b. Choose this arbitrarily 15.Dependent variable? a. On vertical axis b. calculate from or observe the independent variable 16.What is the difference between position, displacement, distance, and path length? a. Position: location of object relative to a chosen zero on coordinate axis b. Displacement: indicates change in position c. Distance: magnitude of that position change; always positive d. Path length: length of path that object traveled 17.What is the equation used to find constant velocity? x(t) = x0 + vt 18.Use the following word phrases to determine which constant velocity equation to use: a. Position where; at what spot; how far x = x0 + vt b. Starting position; where was it; t = 0 x0 = x - vt c. How fast v = x – x0/t d. When; how long t = x – 0 /v 19.Conversions a. Convert 25 miles into inches. 1,584,000 inches b. Convert 9 months into seconds. (30.4 days in a month) 23,639,040 seconds c. Convert 5 m/s into mph. 18,000 mi/1609 hr d. Convert 200 seconds into years. 0.00000634 years 20.What is the equation used to find average velocity? v = Δx/Δt 21.What is the equation used to find average speed? a. s. = path length/Δt

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