Q. To give a 19- child a ride, two teenagers pull on a 3.3- sled with ropes, as indicated in the figure . Both teenagers pull with a force of 55 at an angle of 35 relative to the forward direction, which is the direction of motion. 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 .
Q. Two objects with masses 4.90 {rm kg} and 2.70 {rm kg} hang 0.800 {rm m} above the floor from the ends of a cord 6.30 {rm m} long passing over a frictionless pulley. Both objects start from rest. Find the maximum height reached by the 2.70 {rm kg} object.