A chair of mass 10.5 kg is sitting on the horizontal floor, the floor is not frictionless. You push on the chair with a force F=37.0 N that is directed at an angle of 35.0° below the horizontal and the chair slides along the floor. Y Part A Use Newton's laws to calculate the normal force that the floor exerts on the chair. Express your answer in newtons. 15. ΑΣΦ n= ? N

b.1

Boxes A and B are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 80.0 N is applied to box A. Starting from rest, box B descends 11.5 m in 4.50 s. The tension in the rope connecting the two boxes is 32.0 N (Figure 1). Figure F A B 1 of 1 Part A What is the mass of box B? Express your answer with the appropriate units. MB = Submit Part B mA = Submit μA Provide Feedback Value Request Answer What is the mass of box A? Express your answer with the appropriate units. μA Value → Request Answer Units Units ? ?

The block shown in figure #1 above has a mass of 4.30 kg. The applied force (? ⃑ ) has a magnitude of 31.2 N and is 32.0° above the horizontal, frictionless surface the block in on.  a. What is the normal force (magnitude and direction) that acts on the block? b. What is the acceleration (magnitude and direction) that is experienced by the block?