The Expert TA | H 34ny thee homework Chapter 10a Begin Date: 3/29/2018 1201:00 A

Question

The Expert TA | H 34ny thee homework Chapter 10a Begin Date: 3/29/2018 1201:00 AM-Due Date: 4/9/2018 11:00:00 PM End Date: 4132018 1159:00 PM (10%) Problem 1: An ultracentrifuge accelerates from rest to 100400 rpm in 1.75 min. f-100400 rpm -1.75 min 29.4 cm 33% Part (a) what is its angular acceleration in ra/? Grade Summary Dedactions s Pobential cotan0 asin acos0 atanO acotano sinho coshO tanhO cotanho O Degrees Radians Submit Hint I give up Feedback: IS deduction per feedhack Hints: deduction per hint.Hints remaining 33% Part (b) what is the tangential acceleration of a point 94 m from the aus of rotation in mls2? 33% Part (c) what is the centripetal acceleration in multiples of g of this point at full speed?

Explanation / Answer

a) w = 100400 * 2 pi / 60 = 10,514 rad/s

t = 1.75 min = 1.75 * 60 = 105 s

w = w0 + alpha t

10,514 = alpha * 105

alpha = 100 rad/s2

b) at = alpha * r = 100 * 0.094

tangential acceleration = 9.41 m/s2

c) ar = w2 r = 105142 * 0.094 = 1.04 * 107 m/s2

1.04 * 107 m/s2 / 9.8 = 1.06 * 106 g

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