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If a force of 57N is applied at 17 degrees below the horizontal to a 30...

If a force of 57N is applied at 17 degrees below the horizontal to a 30 kg box at rest on a flat table, what is the force returned to the box by the table?

Two masses hang vertically at opposite ends of a very light rope. This rope is placed over an ideal pulley. One mass is 2.2kg and the other is 6.1 kg. If the masses are released, what is the resulting acceleration of the 2.2kg mass. A FBD and complete use of Newton's 2nd Law (sum forces) requires for full credit.  

What is the appropriate angle of bank for a race track curve with a diameter of 220 m that is to be navigated with out friction by 3200 kg race cars at 31.3 m/s?

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