Suitcase and Upward Acceleration

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To determine the mass of the suitcase, the upward force of 103 N and the upward acceleration of 0.731 m/s² are used in the equation F = ma, resulting in a mass of approximately 140.903 kg. The weight of the suitcase is then calculated using W = mg, yielding a weight of about 1380.85 N. It is noted that the force in F = ma should represent the net force acting on the suitcase. The discussion emphasizes the importance of considering all forces acting on the object for accurate calculations. Understanding these principles is crucial for solving problems involving forces and motion.
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Correct? Please let me know if my logic is off? =D

Given Problem
You pull upward on a stuffed suitcase with a force of 103 N, and it accelerates upward at 0.731 m/s2.
(a)What is the mass of the suitcase?
(b)What is the weight of the suitcase?

Relevant equations
F = ma
W = mg

Attempted Solution
Find the mass of the suitcase given the Force and acceleration. Then use the mass found and plug it back into the weight equation to find weight.
(a)
F = ma
m = F / a
m = 103N / 0.731m/s2
m = 140.903 kg
(b)
W = mg
W = (140.903kg) * (9.8m/s2)
W = 1380.85N
 
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physics114 said:
(a)
F = ma
m = F / a
m = 103N / 0.731m/s2
m = 140.903 kg
The 'F' in F = ma refers to the net force on the object. A better way to write Newton's 2nd law is: ΣF = ma.

Hint: There are two forces acting on the suitcase.
 

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