Question

9) Two disks with different radius are stuck together and rotate about the same as if force (r0.3m and 0.15 in) Montgomery, Physics 1 15 N and F, = 40 N 9) A) 1015 Nm A) What is the net torque noting on the disk system? Identify and label the relevant variable with their corresponding values.. Inscratch Write the full equation used and algebraically solve for the unknown using only symbols (no numbers) Plug in the values and solve for the numerical valve of the unknown. B) What is the angular acceleration if the disk system has an moment of inertia 1-2 kgm'? Identify and label the relevant variable with their corresponding values. I=zkan2 In Scratch. Write the full equation used and algebraically solve for the unknown using only symbols (no numbers) a=It > Plug in the values and solve for the numerical valve of the unknown. 9) B) 5125 10) Cave man Mike rolls a large solid disk of stone (m= 100 kg, r = 1.25 m) from rest until it reaches a linear speed (v) of 2 m/s, --- A) What total energy does the stone disk have when it reaches 2 m/s? Identify and label the relevant variable with their corresponding values. mdisk-loolg r=1125m Ivizoma Write the full equation used and algebraically solve for the unknown using only symbols (no numbers) Inscratchu Plug in the values and solve for the numerical valve of the unknown. 10) A) B) How much work did caveman Mike have to do to get the stone disk to roll with a velocity of 2 m/s? 10) B) Page 4 of 4

Answer 1

9.

equation of net torque

T = F1 r1 - F2 r2

putting the values

T = 15* 0.3 - 40* 0.15 = 1.5 N

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b)

equation for angular acceleration

a = T/I = 1.5 / 2 = 0.75 rad/s^2

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plz post other problem separately

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