Friday
July 25, 2014

Homework Help: Physics

Posted by Jamie on Tuesday, January 2, 2007 at 4:27pm.

What is the spring constant of a spring that stores 25 J of elastic potential energy when compressed by 7.5 cm from its relaxed length?

I know that I should chnage 7.5 cm into .075 m. Is this equation correct? U(x)= 1/2kx^2. I should have gotten 89N/cm for the correct answer but it isn't working out.

U= 1/2 k x^2

k= 2U/x^2 = 2*25/.075^2=8900N/m^2 This does not convert to the answer you cited.

Or you can work it in cm..

U= 1/2 k x^2
2U/x^2 = 2*25/7.5^2 N/cm

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - What is the spring constant of a spring that stores 25 J of elastic ...
physics - a spring with spring constant k= 100N/m is at its equilibrium length a...
Physics - A spring with spring constant k=100 (N/m) is at its equilibrium length...
Physics - The length of a spring increases by 7.2 cm from its relaxed length ...
Physics ( elestic potential energy) - A spring with a force of 5.2 N/m has a ...
Physics - The staples inside a stapler are kept in place by a spring with a ...
physics - The staples inside a stapler are kept in place by a spring with a ...
Physics - A spring with a force constant of 5.4 N/m has a relaxed length of 2.63...
Physics - A block with mass m = 2.00 kg is placed against a spring on a ...
physics - A 4.9 g marble is fired vertically upward using a spring gun. The ...

Search
Members