Question

A body is in translator equilibrium if

• A. it is in uniform motion
• B. resultant force on it is zero
• C. it is at rest
• D. it is in accelerated motion

Answer 1

Answer: (A), (B), (C)

it is at rest

Explanation of the correct option

Option (A) : it is in uniform motion

1. When the resultant force on a body is zero, it is at rest, or it is in uniform motion, it is in translatory equilibrium.
2. In all three circumstances, there is a net equilibrium.

Option (B) : resultant force on it is zero

1. A body is said to be in translator equilibrium if it has constant velocity or the net force applied to the body is zero.
   $F_{\text{net}}=0$
   $\therefore a=0\text{or}v=\text{constant}$

Option (C) : it is at rest

1. In translatory equilibrium, the body's centre of mass is either stationary or moving rectilinearly at a constant velocity.

Explanation of the incorrect option

Option (D) : it is in accelerated motion

1. The direction of motion in a circular motion is constantly changing. When the direction changes, the velocity changes as well. As a result, circular motion is a faster motion.

Hence, option (A), (B) and (C) are the correct answer.