Sample Problem 1. A stone is thrown horizontally from a cliff with a velocity of 7m/s. What is the vertical velocity of the stone after 3 seconds? Given: V=7m/s t = 3 s Viy = 0 m/s ag = 9.8 m/s2 Solution: Vfy = viy - agt Vfy = 0 - ( 9.8 m/s²)(3s) Vfy= -29.4 m/s Sample Problem 2 A man dives from a 35 m high cliff and reaches the water with a final vertical velocity of 45m/s. How much time had elapsed before he reached the water? Given: Viy = 0 m/s ag = 9.8 m/s? Vfy= 45m/s t = ? Solution: Vây = Viy - agt -45m/s = 0m/s - 9.8m/s2 (t) -45m/s t = -9.8 m/s² t = 4.59 s Directions: Analyze and solve the following problems in your notebook/on a separate sheet of paper. Show your solutions. 1. A moving plane drop of a package at a speed of 25 m/s. What is the vertical velocity of the package after 20seconds? 2. From a tall building, a girl throws a piece of paper at a velocity of 5m/s. What is the horizontal velocity of the paper after 5 seconds? 3. At what time will a ball thrown horizontally reach its velocity at 19.6 m/s downwards? 4. A stone is thrown at a speed of 15m/s. What is the horizontal velocity after six seconds? 5. A stone is thrown at a speed of 15m/s. What is the vertical velocity after six seconds?

Sample Problem 1. A stone is thrown horizontally from a cliff with a velocity of 7m/s. What is the vertical velocity of the stone after 3 seconds? Given: V=7m/s t = 3 s Viy = 0 m/s ag = 9.8 m/s2 Solution: Vfy = viy - agt Vfy = 0 - ( 9.8 m/s²)(3s) Vfy= -29.4 m/s Sample Problem 2 A man dives from a 35 m high cliff and reaches the water with a final vertical velocity of 45m/s. How much time had elapsed before he reached the water? Given: Viy = 0 m/s ag = 9.8 m/s? Vfy= 45m/s t = ? Solution: Vây = Viy - agt -45m/s = 0m/s - 9.8m/s2 (t) -45m/s t = -9.8 m/s² t = 4.59 s Directions: Analyze and solve the following problems in your notebook/on a separate sheet of paper. Show your solutions. 1. A moving plane drop of a package at a speed of 25 m/s. What is the vertical velocity of the package after 20seconds? 2. From a tall building, a girl throws a piece of paper at a velocity of 5m/s. What is the horizontal velocity of the paper after 5 seconds? 3. At what time will a ball thrown horizontally reach its velocity at 19.6 m/s downwards? 4. A stone is thrown at a speed of 15m/s. What is the horizontal velocity after six seconds? 5. A stone is thrown at a speed of 15m/s. What is the vertical velocity after six seconds?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 1P

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A stone is dropped from a high cliff vertically. After 5.78 seconds, it hits the ground. How high is the cliff? (use g = 9.8 m/s^2) A. 163.7 (Why positive) B. -163.7 (Why negative) Explain and draw an illustration for your answer.
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