Old Midterm 2

Old Midterm 2 - agnew(ja26385 oldmidterm 02 Turner(58220...

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agnew (ja26385) – oldmidterm 02 – Turner – (58220) 2 vector F g − N = M v 2 r ˆ k , so N = vector F g M v 2 r ˆ k = M parenleftbigg g v 2 r parenrightbigg ˆ k = (24 kg) × bracketleftbigg (9 . 8 m / s 2 ) (7 . 9 m / s) 2 (13 m) bracketrightbigg ˆ k = 119 . 982 N . The force with which he presses against the seat is equal but opposite to the normal force. 003 10.0 points An object attached to the end of a string swings in a vertical circle of radius 1 . 7 m as shown. At an instant when θ = 34 , the speed of the object is 9 m / s and the tension in the string is 34 N. The acceleration of gravity is 9 . 8 m / s 2 . 9 m / s 34 N 1 . 7 m 34 9 . 8 m / s 2 What is the mass m of the object?
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