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{"ops":[{"insert":"a.    A child of mass 30 kg slides from rest down a wooden pole by a distance of\n3.0 m. Calculate the average force of friction acting on the child if her speed is\n2.0 ms"},{"attributes":{"script":"super"},"insert":"-1"},{"insert":" when she hits the ground. Take g=10 ms"},{"attributes":{"script":"super"},"insert":"-2"},{"insert":"\n\nb.   The average angular acceleration of a stone lodged in a rotating car wheel is\n100 rads"},{"attributes":{"script":"super"},"insert":"-2."},{"insert":" What will the stone\u2019s final angular speed be after 3.0 s, if it starts\nfrom rest? Also calculate its angular displacement during this time.\n\nc.   A star having rotational inertia of 10 x10"},{"attributes":{"script":"super"},"insert":"48"},{"insert":" kgm"},{"attributes":{"script":"super"},"insert":"2"},{"insert":" is rotating at an angular speed\nof 2.0 revolutions per month about its axis. The only force on it is the force of\ngravitation. When its nuclear fuel is exhausted, it shrinks to a neutron star\nhaving rotational inertia of 6.0 x10"},{"attributes":{"script":"super"},"insert":"48"},{"insert":" kgm"},{"attributes":{"script":"super"},"insert":"2"},{"insert":" Determine the angular speed\nof the neutron star in revolutions per month.\n\n\n"}]}

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