A 40-Kg Mass on the End of a String Rotates in in a Circular

question 21

Multiple Choice

A 4.0-kg mass on the end of a string rotates in a circular motion on a horizontal frictionless table. The mass has a constant speed of 2.0 m/s and the radius of the circle is 0.80 m. What is the magnitude of the resultant force acting on the mass?

• A) 39 N
• B) 20 N
• C) 44 N
• D) 0 N
• E) 30 N

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Definitions:

Recall

The cognitive process of retrieving information from memory, which can range from remembering past events to recollecting learned facts.

Semantic Encoding

The process of encoding sensory information into memory in a meaningful way, associating it with concepts and knowledge already in memory.

Acoustic Encoding

The process of converting auditory information into a memory or cognitive representation in the brain.

Sensory Encoding

The process by which sensory information is translated into signals that the brain can understand and process.