Please provide step by step solutions so I can understand them better. Thank you.

11. 12. 13. 14. 15. What force F must be needed to lift the 44.5-kg block at constant velocitv? (a) 22.3 N (b) 44.5 N (c) 218 N (d) 437 N A block of weight is pushed to the right across a level surface at a constant velocity by a force P acting at an angle 6 above the horizontal. as .shmvn. The magnitude of the normal force exerted on the block bev the surface is (a) p sin 6 (b) w P sin e (c) + p cos e (d) P cos 6 44.5 kg w A 3.25-kc block of silver is dropped fronl rest at a height of 75.() meters. One-third of the potential energy is convened into heat energy which raises the temperature of the silver. The specific heat of sil\ er is 234 joules per kilogram per Celsius degree. What is the increase in temperature of silver? (a) 1.05 cc (b) 2.32 C: (c) _3.14' CC (d) 3.73 C: Three point masses of 2.15 kg. 4.15 kc. and 5.75 ke are attached to a rod of necligibie mass. as 1.00m 3.00 m 2.15 7.00 m 4.15 kg 1.00 m 5.75 kg How far from the left cnd of the rod is the center of mass of this system located? (a) 3.40 m 6.80 m 10.2 m (d) 13.6m The pressure exerled by the force F) on the piston of area A) is transmitted throuch the fluid without diminution. If An is greater than which of the following xvill be true of the resulting upward force, FO (a) Fs will be equal to Fl. initially. and then decrease. (b) F, will be egual to Fl. (c) F, will be less than Fl. (d) F 3 will be greater than Fl. Fiuic