A Mass of 100 G Is Attached to One End

question 81

Multiple Choice

A mass of 100 g is attached to one end of a massless rod, 10 cm in length, which is pivoted about the opposite end. The rod is held vertical, with the mass at the top, and released. The rod swings. What is the speed of the mass at the instant that the rod is horizontal?

• A)0.71 m/s
• B)4.0 m/s
• C)2.0 m/s
• D)1.4 m/s
• E)2.8 m/s

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