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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