(II) The two forces F, and F, shown in Fig. 4-52a and b (looking down) act on an 18.5-kg object on a frictionless tabletop. If F = 10.2 N and F, = 16.0 N, find the net force on the object and its acceleration for (a) and (b). y y F2 120° F 90° F (a) (b) FIGURE 4–52 Problem 28.

1. Two blocks are connected by a massless rope as shown below. The mass of the block on the table is m₁ and the hanging mass is m₂. The table and the pulley are frictionless. a₁ y m₁ X 3 Subpart 1: Draw FBDs In your notebook, draw free body diagrams for m, and m₂ using the template as shown below. The forces acting on the system are weights of the blocks, m₁g, and mêg, the tension in the string T and the normal reaction N₁ of the table on m₁. m m₂ Subpart 2: Set up Newton's Second Law Equations a2 m₂

A block of mass m slides down from rest on a rough incline of length 8m where the incline makes an angle of 30° with the horizontal. The block comes to rest on the rough horizontal surface after sliding for 4 m. The coefficient of kinetic friction on the incline is 0.30. The coefficient of kinetic friction on the horizontal surface is different from the incline, find this value using two approaches: (i) Using Newton's laws of motion and Kinematics and 30⁰ (ii) Using Work-Kinetic Energy Theorem (Give answer to 2 sig. figs.) 4 m 8 m WA

(a) A 1 kg block of wood sits on a 30 degree incline. If an applied force of 10 N causes the block to accelerate up the ramp at 0.5 m/s^2 what is the force of friction between the block and the ramp. [K___/4] A