(13%) Problem 7: A ball of mass m :05? kg hangs on a light rope from the ceiling of a train. The train accelerates forward, on horizontal tracks, in the positive x direction. The string makes an angle of r :31 u with vertical. A coordinate system is provided. [> 8 25% Part {3) Write an expression for the horizontal component of the net force. Grade Summary EF= Ddddddddd D Potential 100% 1 Submissions sin! or! I sing $3) I ' .. Attempts remaining: (0 (fr.- per attempt) _F'L| _L I m I n I id BACKS? DEL 0% 1 0d; detailed View 2 0'5 Submit I llin'. I Fog-{Hench I l pix c up! I Hints: i for a 0'5 deduction. Hints remaining: 3 Feedback: A for a 0%- deduction -Shown is a free-body diagram of the ball. The No meaningful feedback available for the current 1: component of the tension force is the only contribution to submission. - A 25% Part {b} Write an expression for the vertical component of the net force. . a 25% Part {c} What is the numeric value, in newtons , of the tension in the rope? - A 25% Part {d} What is the magnitude, in meters per squared second, of the acceleration of the train