Masteringcomputerscience Hwe 12 a18 Marmemmmmor system ot Secure I https//sessio

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Masteringcomputerscience Hwe 12 a18 Marmemmmmor system ot Secure I https//session,masteri rngengineering-com/myct/ite mView? assignment ProblemID-5609399&offse; next in as Ahmed Allain HwN12. Ch18 Momentum for system otpa Problem 18.16 previous l 5 of 10 I Problem 18.16 Part A The radius of the pulley is 125 mm and the moment of If the system is released from rest, how far does the 20- mass fall in 078 inertia about its axis is I o os kg xpress your answer with the appropriate units. Ca a Talihe Units Part B what is th benaron in the ropa between the 20-kg mass 4 kg. Express your answer with the appropriate units. 20 kg

Explanation / Answer

here,

radius , r = 125 mm = 0.125 m

I = 0.05 kg.m^2

a)

the accelration , a = ( 20 - 4) * 9.81 /( 20 + 4 + I/r^2)

a = ( 16 * 9.81)//( 20 + 4 + 0.05/0.125^2)

a = 5.77 m/s^2

for t = 0.7 s

the distance travelled , s = 0 + 0.5 * a * t^2

s = 0.5 * 5.77* 0.7^2 m

s = 1.41 m

b)

let the tension in rope between 20 kg mass and pulley be t

20 * g - t = 20 * a

20 * 9.81 - t = 20 * 5.77

t = 80.8 N

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