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Q1. An accelerometer in the control system consists of a 4.60g object sliding on a horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out vibrations of the sliding object. When subject to a steady acceleration of 0.800 g, the object must be located 0.600cm from its equilibrium position. Find the force constant required for the spring.

Q2. A 25 kg solid door is 220cm tall, 94cm wide. What is the door's moment of inertia for rotation about a vertical axis inside the door, 13cm from one edge?

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