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

Question

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

Quizplus · Accepted Answer

The Answer of 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

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