A 070-Kg Disk with a Rotational Inertia Given by MR²/2 Is

question 73

Multiple Choice

A 0.70-kg disk with a rotational inertia given by MR²/2 is free to rotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around the disk and a 2.0-kg mass hangs from the free end. If the string does not slip then as the mass falls and the cylinder rotates the suspension holding the cylinder pulls up on the cylinder with a force of:

• A) 6.9 N
• B) 9.8 N
• C) 16 N
• D) 26 N
• E) 29 N

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