A 040-Kg Mass Attached to the End of a String Swings

question 25

Multiple Choice

A 0.40-kg mass attached to the end of a string swings in a vertical circle having a radius of 1.8 m. At an instant when the string makes an angle of 40 degrees below the horizontal, the speed of the mass is 5.0 m/s. What is the magnitude of the tension in the string at this instant?

• A) 9.5 N
• B) 3.0 N
• C) 8.1 N
• D) 5.6 N
• E) 4.7 N

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Definitions:

Presbycusis

Age-related hearing loss, gradually occurring as individuals get older.

External Acoustic Meatus

The external passage of the ear leading to the tympanic membrane, or eardrum.

Auditory Canal

The tube that runs from the outer ear to the middle ear, transmitting sound waves collected by the ear's auricle (outer part) to the tympanic membrane.

Cochlea

A spiral-shaped cavity in the inner ear that plays a key role in the sense of hearing by converting sound vibrations into electrical signals.