[ d) what should be the ball's initial velocity angle (above horizontal)? ]

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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For a typical foul shot, the rim center is 4.2 m
horizontally and 1 meter above where the ball is last
touched; ball duration in the air is 1.00 seconds before
rim contact.
Transcribed Image Text:For a typical foul shot, the rim center is 4.2 m horizontally and 1 meter above where the ball is last touched; ball duration in the air is 1.00 seconds before rim contact.
[ d) what should be the ball's initial velocity angle
(above horizontal)? ]
-3.90 m/s
+3.90 m/s
+7.80 m/s
+5.90 m/s
-9.80 m/s
+1.00 m/s
+11.80 m/s
-7.80 m/s
Transcribed Image Text:[ d) what should be the ball's initial velocity angle (above horizontal)? ] -3.90 m/s +3.90 m/s +7.80 m/s +5.90 m/s -9.80 m/s +1.00 m/s +11.80 m/s -7.80 m/s
Expert Solution
Step 1

In horizontal direction by 

Sx = Ux × t 

Ux = 4.2/1 = 4.2 m/s 

In vertical direction by 

Sy = Uy × t + (1/2)ay × t^2

1 = Uy - (9.8/2)

Uy = 4.9 m/s

 

So, initial velocity angle

Theta = tan^-1(4.9/4.2) = 49.4°

 

 

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