Answered: The man tries to reposition the 50 kg…

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

The man tries to reposition the 50 kg refrigerator in his kitchen by pushing it from rest with a force P = 170 N, inclined 30° from the horizontal at 1.60 m from the floor. The coefficient of non-sliding friction between the floor and the refrigerator is μs = 0.40.

After pushing, the refrigerator started to tip.

Which of the following quantities is ZERO at the instant described in the problem?
a. friction at A
b. body's angular acceleration
c. body's angular velocity
d. the acceleration of mass center G

Which of the following values is closest to the magnitude of the angular acceleration of the refrigerator?
a. 7.57 rad/s^2
b. 2.50 rad/s^2
c. 1.892 rad/s^2
d. 1.877 rad/s^2

1.60 m
30°
THIS SIDE UP.
REF INSIDE
-0.70 m
1.85 m
170 N
30°
1.60 m
0.35 m
G
“I
490.5 N
0.70 m
A
0.925 m
N
Ff

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