15. The left mass is moving down. Draw FBD for each mass. Include friction. m1. m2 16. Draw FBD for the right mass accelerating downhill. 8 kg 3.5 kg 35° 35° 17. Draw FBD diagram for both the masses. Consider friction between the table and the block. 2 kg F 5 kg 18. Draw FBD diagram for the two masses on the right. 4 kg 5 kg 3 kg 1

8. Two 14-kg blocks are connected with a light rope pand the system is accelerating at 1.8 m/s°[Right]. The coefficient of kinetic friction between the blocks and the floor is 0.35. A F. a) Calculate the magnitude of the applied force, F,. b) Calculate the tension in the rope between block B and A.

The net external force on the 25.5kg mower is 48.0N. If the force of friction is 22.5N. a. What force F in newtons is the person exerting on the mower? b.Suppose the mower is moving 1.10 m/s when the force F is removed. How fat will the mower go before stopping?

3. Two blocks A and B are connected by a rope and pulled with some force F along a frictionless horizontal surface, as shown. B a. Draw a free-body diagram for each block. b. Write Newton's second law for each block and obtain equations for the x and y directions. c. If the tension in the rope is given by T = F/3, find the ratio of the masses, ma/mg.

Objects 1 and 2 are shown below. Object 1 has mass 20 kg, object 2 has mass 9 kg, and the kinetic coefficient of friction for object 1 on the table is 0.3. If object 1 is pushed so that it is moving away from the pulley, then find the magnitude of the acceleration of each mass and the tension in the string. motion m2 8. acceleration magnitude D. 5.304 m/s? E. 5.069 m/s F. 4.355.m/s A 4.101 m/s? В. 4.813_m/s C. 4.532.m/s? |--/ 9. tension А 38.93_N D. 44.01 N В. 46.13.N E. 41.2_N C. 42.58 N F. 48.44 N /--/

Two masses m₁ = 7.1 kg and m2 = 3.6 kg are connected by a string as shown. If the pulley is massless and the surface is frictionless, the magnitude of the tension in the string is A. 11.4 N OB. 11.9 N OC. 23.4 N OD. 46.2 N E. 69.6 N m₁ m₂

13. A7.5 kg backpack is sliding across the floor. The coefficient of friction between the backpack and the floor is 0.20. Answer the following: b) What is the normal force between the backpack and the floor? Your answer: O 1.5 N O 7.4 N O 15 N O 74 N