The discussion focuses on calculating force from the energy of a particle, specifically using the formula for potential energy in a spring, expressed as E = k*(|x1-x2| - L)^2, where k is the stiffness and L is the rest length. The internal force can be derived from the potential energy using the equation internal force = -d(potential energy)/dx, leading to the expression internal elastic force = -kx. Additionally, the discussion touches on more complex scenarios, such as bending rods, where energy is expressed as E = k(theta - original theta), incorporating angular displacement.
PREREQUISITESPhysics students, mechanical engineers, and anyone interested in the principles of force and energy in mechanical systems.
ila1985 said:If I have a energy of a particle and I need to calculate the expression for force on it how do i do it.
eg: energy of a spring = k*(|x1-x2| - L )^2
where x1 and x2 are particle at end of the springs and K is stiffness. L rest length.