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A 330-g air track cart on a horizontal air track is attached to a string that goes over a pulley with a moment of inertia of 5.00 x 10-6 kg?m2 and a radius of 1.35 cm. A 255-g mass hangs from the other end of6 the string and is released.
(a) Draw free body diagrams for the cart, the hanging mass, and the pulley.
(b) Write Newton's second law equation for each of the three objects.
(c) Find the acceleration of the cart and the hanging mass.
(d) Find the angular acceleration of the pulley.
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An insulated Thermos contains 110cm3 of hot coffee at 90 °C. You put a 12g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Care for the coffee as thoug..
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