A Sticky Hockey Puck Slides Along a Frictionless, Horizontal Ice

question 54

Multiple Choice

A sticky hockey puck slides along a frictionless, horizontal ice surface at 75 m/s in the +x direction. It collides with a second sticky puck originally sliding at 25 m/s in the -y direction. They collide perfectly inelastically. If the first puck has a mass equal to half that of the second, what is the angle of their final velocity vector below the +x direction?

• A) 9.5 degrees
• B) 42 degrees
• C) 34 degrees
• D) 49 degrees
• E) 37 degrees

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