Class Management Help Homework 5 Begin Date: 2/15/2018 12:00:00 AM-Due Date: 3/7

Question

Class Management Help Homework 5 Begin Date: 2/15/2018 12:00:00 AM-Due Date: 3/7/2018 11:59:00 PM End Date: 3/7/2018 11:59.00 P (496) Problem 2: It takes atime t 69s for a record to revolve on a record player once. A particular point on the record moves past the needle at a speed of V- 0.85 m/s. Randomized Variables t = 0.69 s Vn= 0.35 m/s 5096 Part (a) what is the radius at which the needle is in contact with the record in m? Grade St Deduction Potential sin cos0 789 cotan asin acos atan0 acotan sinh0 cosh anh0 cotanh 4 5 6 Submissi Attempts detailed Degrees Radians 1 give up Submit Hint Hints: 2% deduction per hint Hints remaining Feedback:--deduction per feedback. 50% Part (b) What isthetangent alspeed v: of a point on the recordthat satr; 005 min ns?

Explanation / Answer

Here,

t = 0.69 s

v = 0.85 m/s

part A)

let the radius is r

time taken for one circle = distance/speed

t = 2pi * r/v

0.69 = 2pi * r/.85

r = 0.093 m

the radius is 0.093 m

b) for r = 0.05 m

v = 2pi * 0.05/.69

v = 0.46 m/s

the speed is 0.46 m/s

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