Day 23 b-cp-midterm review pt1
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Day 23 b-cp-midterm review pt1 Presentation Transcript

  • 1. CP physicsGood morning! Please…• Take your cheat sheets, to be checked• Answer the warm-up question: – A baseball is thrown straight down from a building that is 65 meters tall from rest. What will its velocity be right before it hits the ground?
  • 2. agenda:1. Word Wall2. Cheat Sheet: you cannot have sample problems done out3. Review notes & questions4. Projectile motion review5. Review activityReminders:1. RE-taking your HOT Task? Come after school, check with me a date that works for you 1. Last day: WEDNESDAY THIS week
  • 3. Midterm topicsTopics Suggested Study Techniques 1. Conversion, measurement, • Look over all old tests & know precision, accuracy how to do every problem • Go over your notes from each 2. One-dimensional motion: unit – be familiar with concepts constant speed • Re-do problems from the 3. One-dimensional motion: homework & problems from the accelerated motion review sheet 4. Free-fall motion Format: 5. Vectors • 30 multiple choice • 14-15 problems with multiple 6. Projectile motion parts 7. Forces & Newton’s laws
  • 4. 1. Conversion, measurement, precision, accuracy• Using factor label method to convert numbers• What are some examples of SI units used in physics? English units?• What are the significant figures for the following two numbers: – 0.02003 54300• What is precision? What is accuracy?• How to convert between metric units – Know kilo- to milli-
  • 5. 2 & 3. One-dimensional motion: constant speed & Acceleration• Graphing motion – Identifying the information given on an x vs. t, v vs. t, a vs. t graph • Slope of the lines on the graphs • Area under the curve• Solving problems using one-dimensional motion equations
  • 6. 2. One-dimensional motion: constant speed• Graphing motion
  • 7. 4. free-fall motion• The acceleration of an object in free-fall• Using motion equations to solve free-fall problems: – An object dropped from rest – An object dropped with an initial velocity
  • 8. 4. free-fall motion• Sample problem: a ball is dropped with an initial velocity of 12.0 m/s. – What will be the velocity of the ball after 2.0 seconds? – If it takes 5.5 seconds for the ball to hit the ground, how tall is the building? -31.6 m/s
  • 9. 5. vectors• Difference between scalar and vector quantities – What are some examples of each?• Breaking vector into its components• Solving for resultant vectors by adding or subtracting two vectors that are at a right angle to one another.
  • 10. 5. Vectors• Draw the following vectors: – 5 meters at 30 degrees south of west – 10 meters at 25 degrees east of south
  • 11. 6. Projectile motion• Concepts behind projectile motion – Projectile motion is anything that has an initial horizontal velocity that is under the influence of free-fall – X & y dimensions of motion are completely independent of one another • What happens in the x-direction? • What happens in the y-direction?• What is range? At what angle does any object have maximum range?• Problems with initial horizontal velocity• Problems with projectiles launched at an angle.
  • 12. 7. Forces• Newton’s laws and how they apply in various situations – What is Newton’s first law? Second law? Third?• Drawing free-body diagram• Problems with friction on an inclined plane• Problems with friction on a level surface• Calculating coefficients of kinetic and static friction.
  • 13. 7. Forces• A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 185 N so that the box moves with a constant velocity. If the mass of the books is 35.0 kg, calculate the coefficient of kinetic friction between the box and floor.
  • 14. 7. Forces • What is the net force on each object? FN = 10 NFf = 3 N Fa = 5 N Mg = 10 N FN = 10 N FN = 10 N Ff = 3 N Fa = 1 N Ff = 3 N Fa = 3 N Mg = 10 N Mg = 10 N
  • 15. Jeopardy 2, 3, 4. 1D motion:1. Conversions, Constant speed, 5, 6. Vectors & 7. Forces &Measurement acceleration, free- projectile motion Newton’s laws fall 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400