Forces - SS1 Physics Past Questions and Answers - page 3

In translational equilibrium, the net force acting on an object is zero. This means that the sum of all the forces acting on the object in different directions is balanced, resulting in no acceleration. In rotational equilibrium, the net torque acting on an object is zero. This means that the sum of all the torques acting on the object is balanced, resulting in no angular acceleration. Both translational and rotational equilibrium requires the forces or torques to be balanced, either through their magnitudes or directions.

Torque is the measure of the rotational force acting on an object. In rotational equilibrium, the net torque acting on an object is zero, which means that the clockwise and counterclockwise torques balance each other. 

Equilibrium of forces is essential in engineering and design to ensure the stability and safety of structures and systems. Engineers must carefully consider the forces acting on buildings, bridges, and other structures to prevent collapse or failure.

By analysing and balancing the forces, engineers can design structures that can withstand external loads and remain in equilibrium. Additionally, understanding equilibrium is crucial in designing mechanical systems, such as levers, pulleys, and gears, which rely on balanced forces to function efficiently and effectively.