A 4.00-kg mass and a 9.00-kg mass are being held at rest against a compressed spring on a frictionless surface. When the masses are released, the 4.00-kg mass moves to the east with a speed of 2.00 m/s. What is the velocity of the 9.00-kg mass after the masses are released?
A)2.00 m/s west
B)0.888 m/s west
C)0.500 m/s east
D)4.50 m/s west
E)0.500 m/s west

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The Answer of A 4.00-kg mass and a 9.00-kg mass are being held at rest against a compressed spring on a frictionless surface. When the masses are released, the 4.00-kg mass moves to the east with a speed of 2.00 m/s. What is the velocity of the 9.00-kg mass after the masses are released?
A)2.00 m/s west
B)0.888 m/s west
C)0.500 m/s east
D)4.50 m/s west
E)0.500 m/s west

A 400-Kg Mass and a 9