13-38. Block A has a mass of 20 kg and block Bhas a mass of 50 kg. If the spring is stretched 0.2 m at the instant shown, determine the acceleration of block Bat this instant if it is (a) originally at rest, (b) moving downward with a speed of 3 m/s. Neglect friction. k= 30 N/m A
13-38. Block A has a mass of 20 kg and block Bhas a mass of 50 kg. If the spring is stretched 0.2 m at the instant shown, determine the acceleration of block Bat this instant if it is (a) originally at rest, (b) moving downward with a speed of 3 m/s. Neglect friction. k= 30 N/m A
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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Transcribed Image Text:13-38. Block A has a mass of 20 kg and block Bhas a mass of 50 kg. If the spring is
stretched 0.2 m at the instant shown, determine the acceleration of block Bat this instant if
it is (a) originally at rest, (b) moving downward with a speed of 3 m/s. Neglect friction.
= 30 N/m
A
B
Expert Solution
Step 1
According to the given data
mA=20kg
WA=20x9.81=196.2N
mB=50kg
WB=50x9.81=490.5N
K=30N/m
x=0.2m
We need to find
(a)Acceleration of block B when it is originally at the rest
(b)Acceleration of block B when it is moving with 3m/s down
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