A 50-N Crate Is Pulled Up a 5 $\degree$ To the Horizontal and There Exists a Constant Frictional Force

question 25

Multiple Choice

A 50-N crate is pulled up a 5.0-m inclined plane by a worker at constant velocity. If the plane is inclined at an angle of 37 $\degree$ to the horizontal and there exists a constant frictional force of 20 N between the crate and the surface, what is the force applied by the worker?

• A) zero
• B) 50 N
• C) 30 N
• D) 40 N

---

Definitions:

Classification System

A method of organizing data or items into categories based on shared qualities or characteristics.

Mucous Membrane

A layer of tissue lining various body cavities and structures that secretes mucus, such as the inside of the mouth and nose.

Disease Model

A framework that understands a disorder or illness as resulting from physiological causes and requiring medical treatment.

Alcohol Dependence

A medical condition characterized by a strong desire to drink alcohol, difficulties in controlling its use, persistent drinking despite harmful consequences, a higher priority given to drinking than to other activities and obligations, increased tolerance, and sometimes a physical withdrawal state.