Class Management Help HW 7 Begin Date: 2/29/2016 3:00:00 PM -- Due Date: 3/6/201

Question

Class Management Help HW 7 Begin Date: 2/29/2016 3:00:00 PM -- Due Date: 3/6/2016 11:59:00 PM End Date: 3/24/2016 12:00:00 AM (13%) Problem 3: One kind of cuckoo clock keeps time by using a mass bouncing on a spring, usually something cute like a cherub in a chair 100% Part (a) what is the force constant, in newtons per meter, needed to produce a period of 0.325 s for a 0.014-kg mass on the spring? Grade Summary Deductions Potential k= 2.71 6% 94% sin tan() | | ( Submissions Attempts remaining: 13 (3% per attempt) detailed view 78 9HOME cotan asin acos0 sinhO atan)acotan) si coshOtanhO) cotanh0 3% 3% 0 END Degrees Radians O BACKSPACE EL CLEAR Submit Hint I give up! Hints: 1 % deduction per hint. Hints remaining: 1 Feedback: 1% deduction per feedback.

Explanation / Answer

we know that the period of an oscillating mass is T = 2pi sqrt(m/k)

Then:

k = m (2 pi /T)2 = 0.0140 (6.28 / 0.325)2 =5.227 N/m

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