Question
there are 3 parts
Home Student My Ar Class Management I Help HW 7 (part I due "before Exam 2) Begin Date: 10/11/2017 12:0000 AM-Due Date: 10/16/2017 11:59.00 PM End Date: 10/16/2017 11-59-00 PM 14%) Problem 4: An ultracentrifuge accelerates from rest to 92600 rpm m 1.85 min. Randomized Variables f 92600 rpm t= 1.85 min 9.1 cm Assignment Status Click here for detailed view > 33% Part (a) what is ts angular acceleration in rads.? Grade Summary Deductions Potential 100% Problem Status ICompleted cotan)asin)acos) atan acotan sinho cosh0 tanh cotanho Degrees Radians 1 2 3 2le per attempt) detailed view SobemitHnt I give up Feedback: deduct en per feedback. _ deduction per hint. Hints remaining: -- Hints: cm from the asso riaunims 33% Part (b) What is the tangential acceleration of a point 33% Part (c) What is the centripetal accel eration in multiples of g of this point at full speed? 853
Explanation / Answer
= 92600 rev/min * 2rad/rev * 1min/60s = 9697 rad/s
t = 1.85 min = 111 s
(a)
= o + at
9697 rad/s = 0rad/s + *111s
= 87.36 rad/s²
(b)
a_t = r = 87.36 rad/s² x 0.091 m = 7.95 m/s²
(c)
a_r = ²r = (9697 rad/s)² * 0.091m = 8.56 x 10^7 m/s²
which is 8.56 x 10^7 m/s² / 9.81 m/s² = 8.72 x 10^5"g"s
