Please answer numbers 2-5 2. In order for an object to be in zotational equilibr

Question

Please answer numbers 2-5 2. In order for an object to be in zotational equilibrium, what must be true? A) The net force must be zero. C) Both A & B B) The net torque must be zero. D) Neither A nor B 3. In order for an object to be in translational equilibrium, what must be true? A) The net force must be zero. C) Both A &B; B) The net torque must be zero. D) Neither A nor B 4. Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which force exerts the greater torque A) the first at the midpoint C) both exert equal non-zero torques B) the second at the doorknob D) both exert zero torques 5. Two equal forces are applied to a door at the doorknob. The first force is applied perpendicular to the door; the second force is applied at 30° to the plane of the door. Which force exerts the greater torque? A) the first applied perpendicular to the door B) the second applied at an angle C) both exert equal non-zero torques D) both exert zero torques

Explanation / Answer

2. (B) net torque must be zero.

3. (A) net force must be zero.

4. (B) second at the door nob,

Because torque = force* distance from axis

5. (A) the force applied perpendicular to door,

Because torque is cross product of force and direction

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