Answered: Emmy kicks a soccer ball up at an angle…

Name: Emmy kicks a soccer ball up at an angle of 45° over a level field. She
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Description: Emmy kicks a soccer ball up at an angle of 45° over a level field. She watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. Assume that air resistance is negligible, and plot the horiz

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter28: Special Relativity

Section: Chapter Questions

Problem 54PE: Alpha decay is nuclear decay in which a helium nucleus is emitted. If the helium nucleus has a mass...

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Emmy kicks a soccer ball up at an angle of 45° over a level field. She watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. Assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. Consider only the time that the ball is in the air, after being kicked but before landing. Take "north" and "up" as the positive ?x‑ and ?y‑directions, respectively, and use ?≈10g≈10 m/s² for the downward acceleration due to gravity.

v (m/s)
15
10
5
-5
-10
-15
0.0
Horizontal velocity
0.5
1.0
t (s)
1.5
2.0
v (m/s)
K
15
10
5
0
-5
-10
-15
0.0
0.5
Vertical velocity
1.0
t (s)
1.5
2.0

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