A 30-Kg Mass Is Released from Rest at Point a of of a Circular

question 19

Multiple Choice

A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure.The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface.If the masses stick together,what is their speed after the collision?

• A)2.1 m/s
• B)1.7 m/s
• C)1.9 m/s
• D)1.5 m/s
• E)2.3 m/s

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