Two Blocks,A and B,are Being Pulled to the Right Along

question 67

Multiple Choice

Two blocks,A and B,are being pulled to the right along a horizontal surface by a horizontal 100-N pull,as shown in the figure.Both of them are moving together at a constant velocity of 2.0 m/s to the right,and both weigh the same.
Which of the figures below shows a correct free-body diagram of the horizontal forces acting on the lower block,B?

---

Definitions:

Unfavorable

A situation or condition that is disadvantageous, harmful, or detrimental, often used in financial contexts to describe variances or outcomes that negatively impact performance.

Labor Rate Variance

The difference between the actual labor rate paid and the standard labor rate expected, multiplied by the actual hours worked.

Materials Quantity Variance

The difference between the actual quantity of materials used in production and the expected quantity, reflecting efficiency in material use.

Variable Overhead Efficiency Variance

The difference between the actual hours taken to produce something and the standard hours expected, multiplied by the variable overhead rate.