Mass, Weight and the local acceleration due to gravity

Northbysouth

1. Homework Statement
A person whose mass is 150lb weighs 144.4 lbf. Determine a) the local acceleration of gravity, in ft/s2, and b) the persons mass, in lb and weight, in lbf, if g = 32.174 ft/s2

2. Homework Equations
F=ma

3. The Attempt at a Solution
A) Using F=ma I got

144.4 lbf = (150lb)a
a = 0.963 ft/s2

My answer seems kinda low. Am I missing something?

b) F=ma

mass = 150lb

F = (150lb)(32.174 ft/sec2)
F = weight = 4826 lbf

I also feel like I'm missing something here as well, especially as it asks for the mass, which is already given. Am I misreading the question or something?

Any help would be appreciated. Thanks

Related Introductory Physics Homework Help News on Phys.org

haruspex

Homework Helper
Gold Member
2018 Award
Hint: if you'd been told the person weighed just a little more, 150 lbf, what would the answer have been?

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving