A ball is thrown vertically upward from the 12-m level in an elevator shaft with an initial velocity of 18 m/s. At the same instant an open-platform ele- vator passes the 5-m level, moving upward with a constant velocity of 2 m/s. Determine (a) when and where the ball will hit the elevator, (b) the relative velocity of the ball with respect to the elevator when the ball hits the elevator. t=t Ep= 18 m/s t =0 a = -9.81 m/s2 YB Yo 12 m

A ball is thrown vertically upward from the 12-m level in an elevator shaft with an initial velocity of 18 m/s. At the same instant an open-platform ele- vator passes the 5-m level, moving upward with a constant velocity of 2 m/s. Determine (a) when and where the ball will hit the elevator, (b) the relative velocity of the ball with respect to the elevator when the ball hits the elevator. t=t Ep= 18 m/s t =0 a = -9.81 m/s2 YB Yo 12 m

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A ball is thrown vertically upward from the 12-m level in an elevator shaft
with an initial velocity of 18 m/s. At the same instant an open-platform ele-
vator passes the 5-m level, moving upward with a constant velocity of 2 m/s.
Determine (a) when and where the ball will hit the elevator, (b) the relative
velocity of the ball with respect to the elevator when the ball hits the
elevator.
t=t
Ep=18 m/s
t = 0
a = -9.81 m/s2
Yo 12 m

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