Question

what conditions do you think are necessary for an object to be in equilibrium? a there are no forces on the object b there are no torques on the object c the sum of the torques is zero d the sum of the forces is zero e c and d

Explanation:

For an object to be in equilibrium, two conditions must be met. First, the sum of all forces acting on the object must be zero ($\sum\vec{F} = 0$), which ensures translational equilibrium (no linear acceleration). Second, the sum of all torques acting on the object must be zero ($\sum\vec{\tau}=0$), which ensures rotational equilibrium (no angular acceleration). Option A is incorrect because forces can act on the object as long as their sum is zero. Option B is incorrect as non - zero torques can exist if their sum is zero. Options C and D are each part of the equilibrium conditions, and when combined (Option E), they represent the complete conditions for equilibrium.

Answer:

E. C and D