Question

Question 12 (1 point) A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 20.7° below the horizontal is applied to the box. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box? OA) 3.54 m/s2 OB) 5.14 m/s2 OC) 2.84 m/s2 OD) 1.21 m/s2 E) 1.77 m/s2 Question 13 (1 point) A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 26.0° below the horizontal is applied to the box. What is the minimum coefficient of static friction between the box and the surface required for the box to remain stationary? OA) 0.654

Answer 1

horzort al ace" - ax ar: fonet - Foso -un m foneta = net horizontal force fa applied force m = mas N = up world normal force N= force balance full) m ng efsino (up would noonmal the downwand and weight Ar= fcoso uiling tsing) ay - 250 cos(20.10) - 0.3001 50 X9.8+ sin/20.7")) 50 233.8 6 - 147.11 50 mis 1.79 m/s 2 है) m=song F=250N o =2-60 fcosoa Ulmg+fsino) 750 LOS 26°= N ( 508 9.8 + 250 sin 260) u= 0.375