Aweight w = 1 kn is supported by a cable that passes over frictionless pulleys at d and f. the cable is attached to a winch at g, and cable segment dg is vertical. member abc is built in at a, and members abc, dcef, and be are attached using pins at points b, c, and e. neglect the weights of individual members.

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant