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20. A runner increases his speed from 5.0 m/s to 7.5 m/s over a period of 1.25 s. What is his average acceleeration during this period? 2.00 m/s 10.0 m/s -10.0 m/s^2 2.00 m/s^2

20. A runner increases his speed from 5.0 m/s to 7.5 m/s over a period of 1.25 s. What is his average acceleeration during this period? 2.00 m/s 10.0 m/s -10.0 m/s^2 2.00 m/s^2

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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20. A runner increases his speed from 5.0 m/s to 7.5 m/s over a period of 1.25 s. What is his average acceleeration during this period? 2.00 m/s 10.0 m/s -10.0 m/s^2 2.00 m/s^2
Transcribed Image Text:20. A runner increases his speed from 5.0 m/s to 7.5 m/s over a period of 1.25 s. What is his average acceleeration during this period? 2.00 m/s 10.0 m/s -10.0 m/s^2 2.00 m/s^2
15. A 2.0 g feather and a 9.0 kg bowling ball are free falling in vacuum at the surface of the earth. If both the feather and the ball are dropped from the same height, which object experiences greater acceleration? Both objects experience the same acceleration since both are in gre fall The bowling ball accelerates faster because it is heavier. The feather accelerates faster because it is lighter Both objects experience zero acceleration because they are in vaccuum.
Transcribed Image Text:15. A 2.0 g feather and a 9.0 kg bowling ball are free falling in vacuum at the surface of the earth. If both the feather and the ball are dropped from the same height, which object experiences greater acceleration? Both objects experience the same acceleration since both are in gre fall The bowling ball accelerates faster because it is heavier. The feather accelerates faster because it is lighter Both objects experience zero acceleration because they are in vaccuum.
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