Question

When a body is stationary

• A. There is no force acting on it
• B. The combination of forces acting on it balance each other
• C. The force acting on it is not in contact with it
• D. The body is in a vacuum

Answer 1

The correct option is B

The combination of forces acting on it balance each other

The explanation of the correct option:

In case of option (B)

1. The term "stationary" refers to a body that is not moving, or "at rest."
2. Newton's first rule of motion can be used to describe this notion.
3. A body's velocity is 0 while it is motionless. As a result, its acceleration is zero, and the net force acting on the body is also zero.
4. The law of inertia or the relationship between velocity, acceleration, and force can be used.
5. For a body to be stationary, the net external force working on it must equal zero, which is only achievable when the forces pushing on it are balanced.

The explanation for incorrect options:

In the case of options (A), (C), and (D)

1. The statement given in this option is valid only under certain circumstances, not always. As a result, (A) is not the proper response.
2. Body motion is determined by the net force imposed on it, not by the contact force. As a result, option (C) is incorrect.
3. The net force imposed on the body determines its motion rather than the contact force. As a result, option (D) is incorrect.

Therefore, option B is the correct choice.