A piece of rubber is 45cm long when a weight of 18N hangs from it and is 68cm long when a weight of 22.5 N hangs from it. What is the spring constant of this piece of rubber?
(Ans. 19.56 N/m)

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Solution

Dear Student ,
The spring constant of the rubber be k then ,
F = - kx ( negative indicates the sign of the force )
=> k = F /x = 18 / (45/100) = 40 N/m

So the spring constant , k = 40 N/m .
Regards

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A piece of rubber is 45cm long when a weight of 18N hangs from it and is 68cm long when a weight of 22.5 N hangs from it. What is the spring constant of this piece of rubber? (Ans. 19.56 N/m)

Dear Student , The spring constant of the rubber be k then , F = - kx ( negative indicates the sign of the force ) => k = F /x = 18 / (45/100) = 40 N/m So the spring constant , k = 40 N/m . Regards

A piece of rubber is 45cm long when a weight of 18N hangs from it and is 68cm long when a weight of 22.5 N hangs from it. What is the spring constant of this piece of rubber?
(Ans. 19.56 N/m)

Dear Student ,
The spring constant of the rubber be k then ,
F = - kx ( negative indicates the sign of the force )
=> k = F /x = 18 / (45/100) = 40 N/m

So the spring constant , k = 40 N/m .
Regards