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PHY101 Lab 5 Questions and complete Answers

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When you whirl a rock tied to a string in a horizontal circle around your head, correct answers the string exerts a centripetal force on the rock. The rotational inertia of a sphere of mass m and r ... adius r is proportional to __. correct answers m r^2 When a spinning skater extends his arms from his side to point straight out, his angular rotation decreases, meaning he spins slower. Why? correct answers his moment of inertia increases A ball is attached to a string and rotates in a circle. If it takes 1.00 s to complete one revolution, what is the angular velocity of the ball? correct answers 6.28 rad/s A mass m is tied to a string and swung in a horizontal circle of radius r; the rotational inertia of this system is ___. correct answers m r^2 When angular momentum is conserved, rotational speed correct answers decreases if the mass moves farther from the axis of rotation The rotational inertia of an object depends on the correct answers mass of the object and its distribution with respect to the axis of rotation. A centripetal force is one that is correct answers directed toward the center of curvature of the path of a moving object. As a spinning ice skater pulls her arms in toward her body, her correct answers rotational speed increases due to conservation of angular momentum. A mass of 1 kilogram is tied to a string and swung in a horizontal circle of radius 1 meter. If the mass is then decreased to 0.5 kilogram, the rotational inertia of this new system will be ____ as before. correct answers one half as much [Show More]

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