A Board,with a Weight of 85 N and a Length

question 47

Multiple Choice

A board,with a weight of 85 N and a length of 6.0 m,is supported by two vertical ropes,as shown in the figure.Rope A is connected to one end of the board and rope B is connected a distance of 1.5 m from the other end of the board.A box with a weight of 25 N is placed on the board with its center of mass 1.0 m from rope A. What is the tension in rope A on the left?

• A)13 N
• B)25 N
• C)38 N
• D)48 N

---

Definitions:

Epilepsy

A neurological disorder marked by sudden recurrent episodes of sensory disturbance, loss of consciousness, or convulsions, associated with abnormal electrical activity in the brain.

Reticular Formation

A system in the midbrain comprising a diffuse collection of neurons involved in stereotyped patterns of behavior such as walking, sleeping, and turning to attend to a sudden noise.

Midbrain

Located between the hindbrain and forebrain, an area in which many nerve-fiber systems ascend and descend to connect the higher and lower portions of the brain; in particular, the midbrain relays information between the brain and the eyes and ears.

Parasympathetic Function

A part of the autonomic nervous system responsible for conserving energy and slowing down the heart rate, thus helping the body to relax and recuperate.