A Student Has to Work the Following Problem: a Block

question 10

Multiple Choice

A student has to work the following problem: A block is being pulled along at constant speed on a horizontal surface a distance d by a rope supplying a force F at an angle of elevation q.The surface has a frictional force acting during this motion.How much work was done by friction during this motion? The student calculates the value to be -Fdsinq.How does this value compare to the correct value?

• A)It is the correct value.
• B)It is too high.
• C)It is too low.
• D)The answer cannot be found until it is known whether q is greater than,less than,or equal to 45°.

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Definitions:

Diathesis-stress Model

A psychological theory that explains behavior as both a result of biological and genetic factors ("diathesis") and life experiences ("stress").

Psychopathology

A sickness or disorder of the mind.

Daily Functioning

The ability of an individual to perform normal daily activities, such as eating, bathing, dressing, paying bills, and socializing.

Social Practice

A pattern of behavior that is regularly and repeatedly performed in a society, and thus, becomes a societal norm.