A Ladder Is Extended to a Length of 8 M

question 14

Multiple Choice

A ladder is extended to a length of 8 m.It rests against a smooth frictionless vertical wall at an angle of 55 degrees to the horizontal.The ladder has a mass of 30 kg,and its center of mass is three-eighths of the way up the ladder from the floor.Calculate the magnitude of the resultant of the horizontal and vertical forces at the bottom of the ladder and the floor.

• A)371 N
• B)294 N
• C)77.0 N
• D)304 N
• E)284 N

---

Definitions:

Chest X-ray

A radiographic image of the thorax used to diagnose conditions affecting the chest, its contents, and nearby structures.

NRDS

Neonatal Respiratory Distress Syndrome, a lung disorder mainly affecting premature infants, causing breathing difficulties.

Severe Acute Respiratory Syndrome

A contagious and sometimes fatal respiratory illness caused by the SARS coronavirus.

Cheyne-Stokes Respiration

An abnormal pattern of breathing characterized by progressively deeper and sometimes faster breathing, followed by a gradual decrease that results in a temporary stop in breathing called apnea.