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What is the condition for a system to be in static equilibrium?

The sum of forces must be positive.

The sum of forces in both horizontal and vertical directions must be zero.

The sum of the masses must be zero.

The sum of the forces and moments must be non-zero.

Which of the pair of forces in the figure forms a couple?

Which of the following is true for an object in dynamic equilibrium?

The object is moving at a constant velocity.

The sum of the moments is non-zero.

The object is at rest.

The forces are unbalanced.

The concept of equilibrium in a system can be described as:

A state of balance where forces and moments are balanced.

A state where forces are unbalanced.

A state of rest only.

A state of motion only.

What does the torque generated by a motor depend on?

The weight of the motor.

The speed of the motor.

The size of the motor.

The distance between the pivot and the point of force application.