20191018_104346.jpg - Quiz.7 Physics 1250 Name Circle your TA's name and write your name above Each problem is worth 4 points It =[FXF|=rFsino a= It

20191018_104346.jpg - Quiz.7 Physics 1250 Name Circle your...

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Unformatted text preview: Quiz.7 Physics 1250 Name. Circle your TA's name and write your name above. Each problem is worth 4 points. It/ =[FXF|=rFsino a= It Vr=rw azra a,=rw? Krot=> Iw L=rxmv=Iw I disk = I cylinder =7 1 MR I hoop= I thinring = MR Ipp = mr? * 1) Without wheels a certain skateboard has a mass of 2.50 kg. Each of the four wheels can be approximately Y modeled as a uniform disk with a mass of 0.200 kg and a radius of 3.25 cm. Find the total kinetic energy of the skateboard when it is rolling at a speed of 3.2 m/s. a) 6.14 J b ) 12.8 J C) 4.10 J d) 2.05 J e) 18.9 J m : 2.song m: ?.56 ng V= 3.2 MIS md: 0. 20049 2 ( Z MR " ) ( + ) + 2 ( 2, 8 ) ( 3. 2 )? mtotal: 7158 2 070 0xu m tatal: 3.3 bag 2) Gear A with radius A= 8.25 cm and angular velocity WA = 6.28 rad/sec is used to turn C gear B with radius Is = 3.33 cm by a chain. Gear B and wheel C are fixed with each A other so they turn together and the radius of the wheel is 24.8 cm. Find the tangential speed of a point on the rim of wheel C. B a) 0.518 m/s b ) 15 .6 m/s "c) 3.86 m/s O d) 0.241 m/s e) 8.33 m/s CeerA CA : 8.28 cm W: 4.28 radisic Gearb 1 to : 3. 3 3 cm W B rc = 24,8 cm...
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