HW 6 Begin Date: 10/17/2017 12 00:00 AM-Due Date: 10/24/2017 11:59.00 PM Ead Dat
ID: 1785641 • Letter: H
Question
HW 6 Begin Date: 10/17/2017 12 00:00 AM-Due Date: 10/24/2017 11:59.00 PM Ead Date: 12/162017 12:0000 AM (8%) Problem 2: An elementary student of mass m-J6 kg is swinging on a swag The length from the top of the swing set to the seat is L-4.9 m. The child is attempting to swing all the way around in a full cirele. A 33% Part (a) what is full cirele? tbe minimum spend, in mmen per seem, the child m st be moving with ar the lop ofthe-mard" tsaki Degrees Radian Feedback: dedachon or fedback Ay%Par. (b) Assuming the child ii ravelag athe speed Innd in-rf (a), what is des appareut wegh.r, thelr parh? (At the top, he child is upiide-down) 33% Pari (c) If the velocity atthe bottom is the same as the velecayaithe lop from pari.L what ia de chld's appurmt at the very boos of the path DELL F11 F12 Prtscr insert Delete PU Pon Backspace Loc I 8 9 0 5 6Explanation / Answer
a)mv2/L = mg
v=sqrt(g*L) = sqrt(9.8*4.9)=6.93 m/s should be the speed of mass at top to complete full circle
b)The apparent weight of the mass at the top will be zero .This is because the weight of mass is balanced by centrifugal force
c)If the velocity is same at bottom, then centrifugal force and weight will add up .The apparent weight will be (36*9.8)+(36*6.932/4.9) = 705.6 N
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