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Today, my class had a dispute between who was right. Two answer keys for this problem was provided, so nobody knows the exact answer to this problem. Half of my class said 100 N while the others said 298 N or something.
_{We won't talk about how I wasn't listening to that because I was trying to figure out why we had two answers...}
Anyways, please help me figure out the true answer to this problem: Will it, or will it not?
1. Homework Statement
The maximum force that the handles on a grocery bag can withstand and not rip is 250 N. If 20 kg of groceries are lifted from the floor to the table with an acceleration of 5 m/s^{2}, will the bag hold?
F_{max} = 250 N
m = 20kg
a_{gravity} = 9.81 m/s^{2}
a_{pull} = 5 m/s^{2}
Actually, I'm not sure. This is where we had the dispute in class.
F_{net} = m(a+g) OR
∑F = ma
"is it the force of someone's money dwindling because they bought platform crocs?"
For the first equation, they did:
F_{net} = 20 kg ( 5 m/s^{2} + 9.81 m/s^{2})
F_{net} = 20 (14.81)
F_{net} = 296.2
"No, the bag does not hold."
For me and three people in the class, we probably be wrong:
∑F = ma
∑F = 20 kg ⋅ 5
∑F = 100 N
"Yes, the bag will hold."
WHICH ONE IS IT?!
thanks
_{We won't talk about how I wasn't listening to that because I was trying to figure out why we had two answers...}
Anyways, please help me figure out the true answer to this problem: Will it, or will it not?
1. Homework Statement
The maximum force that the handles on a grocery bag can withstand and not rip is 250 N. If 20 kg of groceries are lifted from the floor to the table with an acceleration of 5 m/s^{2}, will the bag hold?
F_{max} = 250 N
m = 20kg
a_{gravity} = 9.81 m/s^{2}
a_{pull} = 5 m/s^{2}
Homework Equations
Actually, I'm not sure. This is where we had the dispute in class.
F_{net} = m(a+g) OR
∑F = ma
The Attempt at a Solution
"is it the force of someone's money dwindling because they bought platform crocs?"
For the first equation, they did:
F_{net} = 20 kg ( 5 m/s^{2} + 9.81 m/s^{2})
F_{net} = 20 (14.81)
F_{net} = 296.2
"No, the bag does not hold."
For me and three people in the class, we probably be wrong:
∑F = ma
∑F = 20 kg ⋅ 5
∑F = 100 N
"Yes, the bag will hold."
WHICH ONE IS IT?!
thanks
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