# Lec10 - General Physics ELASTICITY AND SIMPLE HARMONIC...

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General Physics A. Brahmia 1 ELASTICITY AND SIMPLE HARMONIC MOTION… Hooke’s Law and Ideal Springs Hooke’s Law states that stress is directly proportional to strain. Hooke’s law is found to hold for most materials, e.g., a wire , rubber band or a spring up to a point which is called the elastic limit . Beyond this limit, the object will not return to its original shape when the force is removed. The potential energy stored is a spring is given by where (x) is the stretched or compressed distance and (k) is the spring constant. kx F 2 2 1 kx PE elastic ELASTICITY AND SIMPLE HARMONIC MOTION… Simple Harmonic Motion Simple harmonic motion (SHM) reference of periodic vibration or oscillations can be described in terms of displacement, velocity and acceleration: When an object with a mass (m) attached to a spring is moved from its equilibrium position and released from rest, the restoring force leads to simple harmonic motion.

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General Physics A. Brahmia 2
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