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1) Mariella is running at a constant speed of 6.19 m/s when she feels exhausted slowing down at a constant rate of 3.8 m/s² until she rests. How long will it take for her to stop?

1) Mariella is running at a constant speed of 6.19 m/s when she feels exhausted slowing down at a constant rate of 3.8 m/s² until she rests. How long will it take for her to stop?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Please answer 1 & 2 only.
1) Mariella is running at a constant speed of 6.19 m/s when she feels exhausted slowing down at a constant rate of 3.8 m/s until she rests. How long will it take for her to stop? 2) A 1.7-m gunman fired a bullet directly above his head at a speed of 90 m/s. What is the maximum height the bullet can reach before it hits the ground? 3) Cyrus became very angry with his defective phone that he threw the mobile phone down the cliff at a speed of 5.16 m/s. What will be the mobile phone's velocity before it hits the ground if the is 20 meters high?
Transcribed Image Text:1) Mariella is running at a constant speed of 6.19 m/s when she feels exhausted slowing down at a constant rate of 3.8 m/s until she rests. How long will it take for her to stop? 2) A 1.7-m gunman fired a bullet directly above his head at a speed of 90 m/s. What is the maximum height the bullet can reach before it hits the ground? 3) Cyrus became very angry with his defective phone that he threw the mobile phone down the cliff at a speed of 5.16 m/s. What will be the mobile phone's velocity before it hits the ground if the is 20 meters high?
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