An Object of Mass M₁ Is Moving with a Speed

question 80

Multiple Choice

An object of mass M₁ is moving with a speed v on a straight,level,frictionless track when it collides with another mass M₂ that is at rest on the track.After the collision,M₁ and M₂ stick together and move with a speed of

• A)v
• B)M₁v
• C)(M₁ + M₂)v/M₁
• D)M₁v/(M₁ + M₂)
• E)M₁v/M₂

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