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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 1.65 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.

30°
170 N
30⁰
0.35 m
1.85 m
THIS SIDE UP.
REF INSIDE
1.65m
1.65 m
Fr
-0.70 m-
N
3. Which of the moment equilibrium equations is CORRECT?
A. +
EMA = -P sin 30
(0.70) - P cos 30 (1.65) + W
(0.35) = -Īa - mag
B. +
EMA = -P sin 30
(0.70) - P cos 30 · (1.65) + W. (0.35) = −Īa
c. +
EMA = P sin 30
(0.70) - P cos 30
(1.65) + W
(0.35) = Īa + mag
D. +
EMA = -P sin 30
(0.70) - P cos 30
(0.35) = -Ta-0.989maG
4. What is the magnitude of the angular acceleration of the refrigerator?
5. What is the magnitude of the acceleration of the mass center G?
(1.65) + W
490.5 N
-0.70m-
A
0.925 m

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