A 30-Kg Mass Sliding on a Frictionless Surface Explodes into Three

question 21

Multiple Choice

A 3.0-kg mass sliding on a frictionless surface explodes into three 1.0-kg masses. After the explosion the velocities of the three masses are: (1) 9.0 m/s, north; (2) 4.0 m/s, 30° south of west; and (3) 4.0 m/s, 30° south of east. What was the magnitude of the original velocity of the 3.0-kg mass?

• A) 1.7 m/s
• B) 1.0 m/s
• C) 1.3 m/s
• D) 2.0 m/s
• E) 2.8 m/s

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