A ball is thrown with an initial speed of 20 m/s from one end of a horizontal platform with a length of 48 m and a height of 32 m at angle of 37° to the the horizontal. At the same time a man who is standing on the ground starts from rest and moves with a constant acceleration of a (see Figure). (a) Find the time of flight of the ball (b) What should be the acceleration of the man so that he can hold the ball before it falls? 20 m/s 37 48 m 32 m 区 cos53° =sin37°=0.6 cos37° =sin53°-0.8 g-9.8 m/s²

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter3: Motion In Two Dimensions
Section: Chapter Questions
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A ball is thrown with an initial
speed of 20 m/s from one end of a horizontal
platform with a length of 48 m and a height of
32 m at angle of 37° to the the horizontal. At
the same time a man who is standing on the
ground starts from rest and moves with a
constant acceleration of a (see Figure). (a)
Find the time of flight of the ball (b) What
should be the acceleration of the man so that he can hold the ball before it falls?
20 m/s
37
48 m
32 m
区
cos53° =sin37°=0.6 cos37° =sin53°-0.8 g-9.8 m/s²
Transcribed Image Text:A ball is thrown with an initial speed of 20 m/s from one end of a horizontal platform with a length of 48 m and a height of 32 m at angle of 37° to the the horizontal. At the same time a man who is standing on the ground starts from rest and moves with a constant acceleration of a (see Figure). (a) Find the time of flight of the ball (b) What should be the acceleration of the man so that he can hold the ball before it falls? 20 m/s 37 48 m 32 m 区 cos53° =sin37°=0.6 cos37° =sin53°-0.8 g-9.8 m/s²
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