z (meters] mc 6 kg mB 11 kg 5. 10 x [meters] -5 100 kg Calculate the moment of inertia about the z-axis for a group of point masses (see Figure). Mass A = 100 kg, mass B = 11 kg, mass C = 6 kg and mass D = 8.8 kg. (PUHQ0239) a) 03.88 x 10 3 kg m2 b) O-9.18 x 10 2 kg m2 c) 04.08 x 10 3 kg m2 d) 03.65 x 10 3 kg m2

4. 00 10 cm MA = 100 g m² = 100 g mc = 200 g mp = 200 g The four masses are connected by massless rigid sticks. a.) Locate the center of mass. b.) The object rotates about an axis that passes through the center of mass and is parallel to the z-axis. The constant angular velocity is w = 8 rad/s. Calculate the total kinetic energy of this system.

Consider the objects labeled A, B, C, and D shown in the figure. A 米」 B C D Each object is composed of identical thin sticks of uniformly distributed mass 3.43 kg and length 0.303 m. What are the moments of inertia IA, IB, Ic, and Ip of the objects about a rotation axis perpendicular to the screen and passing through the black dot displayed on each object? IA = kg-m2 IB = %3D kg-m² Ic = kg-m? ID = kg-m?

A 366-N force is applied at A as shown. y = 370 mm. Determine (b) the smallest force applied at B that creates the same moment about D. Write numerical value and 2 decimal places. + for counterclockwise -100 mm- -200 mm y mm 25° A P D 125 mm C B

Part A Determine the angular momentum of a 78-g particle about the origin of coordinates when the particle is a Find the z-component. Express your answer using two significant figures. Lx = ΜΕ ΑΣΦ Submit Request Answer ▼Part B Find the y-component. Express your answer using two significant figures. Ο ΑΣΦ Ly= ? kg-m²/s ? kg-m²/s

62

During a steady right turn, a person exerts the forces shown on the steering wheel. Note that each force consists of a tangential component and a radially-inward component. Determine the moment exerted about the steering column at O. The moment will be positive if counterclockwise, negative if clockwise. 9.4 N 28 17° 17⁰ Answer: M = 430 mm i 28° 9.4 N B N-m