Chapter 3, Problem 44AP

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# A 2.00-m-tall basketball player is standing on the floor 10.0 m from the basket, as in Figure P3.44. If he shoots the ball at a 40.0° angle with the horizontal, at what initial speed must he throw the basketball so that it goes through the hoop without striking the backboard? The height of the basket is 3.05 m.Figure P3.44

To determine
The initial speed of the basketball.

Explanation

The horizontal component of the initial velocity when the launch angle is 40.0Â° is,

v0x=v0cos40.0Â°=0.766v0

The time required for the ball to move 10.0â€‰m horizontally is,

t=Î”xv0x

Here,

Î”x is the horizontal displacement

v0x is the horizontal component of the initial velocity

t=10.0â€‰m0.766v0=13.1â€‰mv0

The vertical displacement is,

Î”y=yâˆ’y0=3.05â€‰mâˆ’2.00â€‰m=1.05â€‰m

The equation for vertical displacement is,

Î”y=v0yt+12ayt2=(v0sinÎ¸)(13.1â€‰mv0)+12ay(13

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