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InterviewSolution
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A force is acting on a body moving alonog x-axis in the direction of motion of the body. If this force produces a potential energy `u=Ax^(4),` where `A=1.2Jm^(-4),` then the what is the force acting on the body when the body is at `x=-0.8m`? |
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Answer» Here, `u=Ax^(4), A=1.2Jm^(-4), F_(x)=?` `x=-0.8m` As `F_(x)=-(du)/(dx)=-(d)/(dx)(Ax^(4))` `:.F_(x)=-A(4x^(3))=-4Ax^(3)` `=-4xx1.2(-0.8)^(3)=2.46N` |
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