Hookes law

A certain spring is found not to conform to Hooke”s law. The force (in newtons) it exerts when stretched a distance x (in meters) is found to have magnitude 52.8x + 38.4x2 in the direction opposing the stretch. (a) Compute the work required to stretch the spring from x = 0.500 m to x = 1.00 m. (b) With one end of the spring fixed, a particle of mass 2.17 kg is attached to the other end of the spring when it is stretched by an amount x = 1.00 m. If the particle is then released from rest, what is its speed at the instant the stretch in the spring is x = 0.500 m? (c) Is the force exerted by the spring conservative or nonconservative? Explain

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