Class XI Angular acceleration vector is defined as α = 2 dω dt α = d ω 2 dt2 α = dω dt α = d ω 3 dt3 Three thin uniform rods each of mass M and length L are placed along the three axis of a Cartesian coordinate system with one end of each rod at the origin. The M.I. of the system about z- axis is ML2 ML2ML2/6 ML2ML2/3 (2/3) ML2 The M.I. of a body about a given axis is 1.2 kg m2m2. Initially the body is at rest. In order to produce a rotational kinetic energy of 1500 joule, an angular acceleration of 25 rad/ sec2sec2 must be applied about that axis for duration of 10 sec 2 sec 4 sec 9 sec When a mass is rotating in a plane about a fixed point, its angular momentum is directed along the axis of rotation A line at an angle of 45o to the plane of rotation The tangent to the orbit the radius A uniform rod of mass 2 kg is 1 meter long. Its radius of gyration about an axis through its one end and perpendicular to its length in SI units is 1/ 2√√ (3) 2/3 1/√√ (3) 2 /√√ (3) Do you really want to submit this quiz? Cancel Submit Quiz