A Block with Mass M, on the End of a String

question 25

Multiple Choice

A block with mass M, on the end of a string, moves in a circle on a horizontal frictionless table as shown. As the string is slowly pulled through a small hole in the table:

• A) the angular momentum of M remains constant
• B) the angular momentum of M decreases
• C) the kinetic energy of M remains constant
• D) the kinetic energy of M decreases
• E) none of the above