Question

Determine and plot the moment M which must be applied to the crank OA in order to hold the cylinder of mass m 9 kg in equilibrium. Neglect the effects of the mass of OA and friction and consider the range 0 0s 180°. After you have the plot evaluate M at 0 68° and 114°. State the maximum and minimum values of the absolute value of M and the values of e for which these extremes occur, and physically justify these results B 0.33 m 0.38 m OA 0.23 m Answers: e 68° M N m e 114 M = N m N m a A Mmaxl= N.m at Mminl

Answer 1

2owtin M9ka at 0 oundinates of Pom BB are Onigin Geardinates af Pont A ane ( 0.38, 0.33). (4s s n rangemat 5.22 equihibべum. shen The x9.1 = ??.29 N テー mg Tension tu Aope dne t nepe Tinque n OA AB OA X T AB 0.23 SMp)x (0-3+0.25 a9) (- asei X (0.33 -0 O23 0.33x0.23os -(o 0.23 x0.38sin0 + (6.23 T -0 o874 Sin 00759 7.7t654b Sin0 t 6.70 12 11 C0 san 9. 665 N.m.

when - 4. 3 2 38 N.M Requined Monut to maintan eqibonum is |7716546 SiM 6.76121) Cos At 680 q.665 N . m M r.. 32 38 AN.M A B al e 9.03 Mman TO.22 N 6. 6g 8 N.m at 3 perpendiantar OA ohen M Man Ay lockhrise (-re) when 081

10+E 5 100 150 0 50 angle (degree) -5- LO moment (N.m) LO