OAR Mechanical Comprehension Practice Test 2025 - Free Mechanical Comprehension Practice Questions and Study Guide

To understand what components are necessary for a force to do work on an object, it's essential to recognize the relationship between force and displacement. Work is defined as the product of force applied to an object and the displacement of that object in the direction of the force. Therefore, for work to be done, there must be:

1. **Force**: This is the push or pull that acts on the object.

2. **Displacement**: This refers to the distance that the object moves while the force is applied. It's crucial that there is movement in the direction of the force.

3. **Cause**: This involves the need for a reason or context in which the force acts, indicating that the force must lead to some action or change in position, effectively contributing to the work done.

Thus, the correct answer outlines these critical elements that collectively determine whether work is accomplished on an object when a force is applied. Other components mentioned in the other choices do not encompass the necessary criteria for work in the context of physics, as they either mix unrelated concepts or omit essential factors.