To give a 19-kg child a ride, two teenagers pull on a 3.7-kg sled with ropes, as indicated...

To give a 19-kg child a ride, two teenagers pull on a 3.7-kg sled with ropes, as indicated in Figure 5-25. Both teenagers pull with a force of 55 N at an angle of 35° relative to the forward direction, which is the direction of morion. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child.

Figure 5-25