Dont need explanation , just the answer please 51. The static equilibrium of a r

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Dont need explanation , just the answer please

51. The static equilibrium of a rigid body in three dimensions is achieved if the following conditions are met: A. The projection of all forces acting on the rigid body along the OX direction is zero. B. The projection of all forces acting on the rigid body along the OY direction is zero. C. The projection of all forces acting on the rigid body along the OZ direction is zero. D. The algebraic sum of all torques acting on the object is zero. E. All of the above 52. A torque is positive if: A. It determines a clockwise motion (rotation) of the rigid body B. It determines a motion with a constant velocity along a circular trajectory C. It determines a transport motion of the rigid body along a straight trajectory. D. It determines an anticlockwise motion (rotation) of the rigid body 53. The physical quantities that are obeying conservation laws are: A. Conservation of mass B. Conservation of the linear momentum C. Conservation of the energy D. Conservation of the angular momentum E. All of the above 54. The "equivalent" of the mass in the dynamics of the rigid body is proportional to: A. Angular momentum B. Torque C. Linear momentum D. Moment of Inertia E. None of the above 55. The absolute magnitude of the torque is the product between A. The force F acting at a perpendicular distance (from the pivot line) on the solid rigid. B. The distance r from the pivot, to the rotation and the tangential component of the force (Ft-Fsinp) acting at a perpendicular distance (from the pivot line) on the solid rigid. C. All of the above 56. The units for the torque are: A. kgm2/s2 B. kgm/s2 C. kgm/s D. kgm2/s E. kg/s

Explanation / Answer

51. E: All of the above

52. D: It determines anticlockwise rotation of the body

53. E: All of the above

54. D. Moment of inertia

55. B. All of the above

56. A

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