A 50-Kg Crate Is Resting on a Horizontal Plank

question 38

Multiple Choice

A 5.0-kg crate is resting on a horizontal plank.The coefficient of static friction is 0.50 and the coefficient of kinetic friction is 0.40.After one end of the plank is raised so the plank makes an angle of 25°with the horizontal, the force of friction is:

• A)0 N
• B)20 N
• C)21 N
• D)22 N
• E)44 N

---

Definitions:

Positive Cost Variance

Occurs when the actual cost of a project is less than the budgeted amount, indicating under-spending or efficiency.

Under Budget

A situation in which the actual spending is less than what was originally planned or allocated for a project or activity.

Management Reserves

Funds set aside by management for unforeseen changes in the scope or cost of a project.

Contingency Reserves

Allocated resources, time, or funds kept in reserve to address potential unforeseen obstacles or costs in a project.