Tareas

1.- Draw the free-body diagram of the 50-kg paper roll which has a center of mass at G and rests on the smooth blade of the paper hauler | |
2.- Draw the free-body diagram of member AB, which issupported by a roller at A and a pin at B. | |
3.- Draw the free-body diagram of the dumpster D of the truck, which has a weight of 5000 lb and a center of gravity at G. It is supported by a pin atA and a pin-connected hydraulic cylinder BC (short link). | |
4.- Draw the free-body diagram of the crane boom AB which has a weight of 650 lb and center of gravity at G. The boom is supported bya pin at A and cable BC. The load of 1250 lb is suspended from a cable attached at B. | |
5.- Draw the free-body diagram of member ABC which is supported by a smooth collar at A, roller at B, andshort link CD. | |
6.- Draw the free-body diagram of the winch, which consists of a drum of radius 4 in. It is pin-connected at its center C, and at its outer rim is a ratchet gear having a meanradius of 6 in. The pawl AB serves as a two-force member (short link) and prevents the drum from rotating. | |
7. - The 50-kg flywheel it rotates with a constant angular velocity beforethe brake is applied. If the coefficient of kinetic friction between the brake pad B and the wheel’s rim is µk=0.5, and a force P is applied to the braking mechanism’s handle. Draw the free-bodydiagram of the flywheel and mechanism’s handle. | |
8) Knowing that the coefficient of static friction between the tires and the road is 0.80 for the automobile shown, Draw the free-body diagram: (a)assuming four-wheel drive(b) rear-wheel drive. | |
9) Each of the gears A and B weighs 20 lb; gear C weighs 5 lb. If a couple M of constant magnitude 50 lb- in. is applied to gear C. Draw thefree-body diagram for gears A, B y C. | |
10) The 75-kg wheel. If it is subjected to a torque of 150 N.m. Draw the free-body diagram. The coefficients of static and kinetic friction between the wheel...