# UB PHY 101 - Free Falling Objects (2 pages)

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## Free Falling Objects

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Dr Zhang's Lecture for the end of chapter 2 and beginning chapter 3

- Lecture number:
- 6
- Pages:
- 2
- Type:
- Lecture Note
- School:
- University at Buffalo, The State University of New York
- Course:
- Phy 101 - College Physics

**Unformatted text preview: **

PHY 101 1nd Edition Lecture 6 Outline of Last Lecture I One Dimension Motion With Constant Acceleration II Kinematic Equations III Free Falling Objects Chapter 2 Continued Chapter 3 Motion in Two Dimensions IV Free Falling Objects V Problem Solving Strategies VI 3 1 Vectors and Properties VII Adding Vectors Current Lecture Free Falling Objects o Can be used with kinematics o Ex If a ball is thrown vertically up with a Vo 9 8 m s A how long does it take to reach the highest point V Vo at T V Vo a T 0 9 8 9 8 1s B what is the maximum height V2 Vo2 2a y y V2 Vo2 2a 0 9 8 2 9 8 4 9 m o Ex A ball is released from rest from a 19 6 m building A how long does it take to reach the ground Known yo 19 6m y om Vo 0 m s a 9 8 m s2 Y yo vot 1 2 at2 0 19 6 0 1 2 9 8 t2 T2 2 19 6 9 8 T 41 2 2s B what is the velocity when the ball reaches the ground V Vo at These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute V 0 9 8 2 V 19 6 m s Problem Solving Strategies o Read very carefully o Draw a diagram o Use kinematics o Solve for unknown Chapter 3 Vectors and Motion in Two Dimensions Vectors have both direction and magnitude Vectors are noted with arrows above the letters Properties o Equality same magnitude same unit same direction Adding Vectors o Must have the same units dimensions o Rule triangle method tip to tail o C A B sides A and B are tip to tail o The negative of a vector runs in the opposite direction A A o Vector Subtraction A B A B o Multiplying dividing by a scalar quantity a number Magnitude of the vector is multiplied divided by that number

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