- #1

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**Springs and... mass??**

A spring with a force constant of 2.1 x 10^4 N/m compresses 0.035m when stepped on by a boxer. The mass of the boxer is....?

k = 2.1 x 10^4 N/m

x = 0.035m

how would you be able to find the mass for this?

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- Thread starter sup90
- Start date

- #1

- 6

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A spring with a force constant of 2.1 x 10^4 N/m compresses 0.035m when stepped on by a boxer. The mass of the boxer is....?

k = 2.1 x 10^4 N/m

x = 0.035m

how would you be able to find the mass for this?

- #2

G01

Homework Helper

Gold Member

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You are expected to show your own efforts on a problem before anyone helps you. What have you tried? What are your thoughts on the problem? What formulas relate to the problem in question. What section of your textbook does the problem relate to? Answer these questions, and we'll be able to help you.

Also, please post all homework type problems in the homework help section of the site next time.

- #3

madmike159

Gold Member

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F=Kx

That is Force (in this case weight) = Force constant * change in length.

Hope this helps.

That is Force (in this case weight) = Force constant * change in length.

Hope this helps.

- #4

G01

Homework Helper

Gold Member

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F=Kx

That is Force (in this case weight) = Force constant * change in length.

Hope this helps.

There is a reason we require students to show work before we help them Mike.

How does just giving him an answer without him doing ANY work, help him in the end?

- #5

- 6

- 0

F = kx

plug F into F = mg; knowing that g = 9.8

and solve for m?

i'm i on the right track?

- #6

madmike159

Gold Member

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- #7

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yes sup, what you said is right. That is essentially how scales work.

- #8

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thank you for your time and help guys =D

- #9

G01

Homework Helper

Gold Member

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Yes, you did indeed help him solve the problem, but I'm just pointing out, for next time, that the rules are that you shouldn't offer help until the original poster shows work. Those are the forum rules.

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