can someone please explain

10. Questions 10 to 12 relate to the following gure. No 10 kg boxes are connected by a massless string that passes over a massless. frictionless pulley as shown below. The boxes remain at rest, with the one on the left hanging vertically and the one on the right 2.0 m from the bottom of an inclined plane that makes an angle of 60 with the horizontal (not drawn to scale]. The coefcients of kinetic friction and static friction between the box on the right and the plane are: m; = 0.15 and in, respectively. What is the tension T in the string? (a) 49 N (b) 85 N (c) 93 N (d) 196 N 11. The magnitude of the frictional force that is acting on the box at rest on the inclined plane is. (a) 130 N mnnN (c) 49 N (a) 13 N (e) 7 N 12. The rope connecting to the boxes is suddenly out! The box on right begins to slide down the plane. The nal velocity of the box on the right at the moment it reaches the bottom of the inclined plane is, (a) 2.3 ms"1 (mums-1 (c) t'rl-ms'l (d) 19ms'l (e) 5.!5ms'1 Continued overleaf