10:30 AM ooo T-Mobile session masteringphysics.com C PHYS 221 Winter 2016 Item 1

Question

10:30 AM ooo T-Mobile session masteringphysics.com C PHYS 221 Winter 2016 Item 1 Aparticle that can move along the z-axis experience an interaction force F, (3ar 5a)N where z is in m Part A Find an expression for the system's potential energy. Express your answer in terms of the variables z and the constant of integration C, where C is in joules. 2c Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining: no points deducted Variables are case sensitive. Check to make sure you are using the correct Case.

Explanation / Answer

Fx = 3x^2 - 5x

We know
Fx = - du/dx
du = - Fx.dx
du = (5x - 3x^2) .dx
u = 5x^2/ 2 - 3x^3/3 + c
u = 2.5x^2 - x^3 + c

Potential Energy is given by, u = 2.5x^2 - x^3 + c

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