Physics 2LC Hooke’s Law and Harmonic Oscillation (Pre lab assignment included) Objective: To experimentally study: • Hooke’s Law of elasticity • Simple Harmonic motion The static and dynamic description of elastic materials is rooted in two basic concepts: Hooke's Law and Simple Harmonic Oscillation. The elastic behavior of many materials can be described in terms of Hooke's Law, F= -kx.In words: “When an elastic material is stretched or compressed (displaced) from equilibrium by an amount x, the restoring force is proportional to the amount stretched or compressed (displacement).” When we have Hooke's Law, Simple Harmonic Oscillationcan take place. A large spring will be used to verify Hooke's Law, and to measure oscillation periods in a simple harmonic oscillator. The Apparatus: 1. A 2-meter stick attached to a vertical support rod, mounted on the lab bench. Weight Meter Stick Photogate Plastic Plate Spring2. A movable clamp with horizontal rod to support the spring and masses. 3. The spring. 4. A clear plastic plate with a black line, used to interrupt the PhotoGate for period measurements. 5. Weight Set consisting of: a) A 50 gram hanger b) Masses of 50 g, 100 g, and 200 g Masses between 50 and 400 grams can be selected, in 50 gram increments. 6. Photogate timer clamped to vertical support rod. 7. Pasco PasPortinterface, Computer with Data Studiosoftware for period measurements and data fitting. CAUTION: DO NOT OVER-STRETCH OR TWISTTHE SPRING - IT WILL NOT RETURN TO ITS ORIGINAL LENGTH AND SHAPE.
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