tb40996
contestada

The potential energy, P, in a spring is represented using the formula P = A equals StartFraction one-half EndFraction b h.kx2. Lupe uses an equivalent equation, which is solved for k, to determine the answers to her homework.

Which equation should she use?

k = 2Px2
k = k equals StartFraction one-half EndFraction P x squared.Px2
k = k equals StartFraction 2 P Over x squared EndFraction.
k = k equals StartFraction P Over 2 x squared EndFraction.

Respuesta :

Answer:

k = 2Px2

Step-by-step explanation:

The equation that she should use is k = 2P/x²

Given the expression that represents the potential energy P, in the spring as;

  • [tex]P = \frac{1}{2} kx^2[/tex]

we are to make the variable "k" the subject of the formula;

Given

  • [tex]P = \frac{1}{2} kx^2[/tex]

Cross multiply

  • 2P = kx²

Divide both sides by x²

2P/x² = kx²/x²

2P/x² = k

k = 2P/x²

Hence the equation that she should use is k = 2P/x²

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