Determine the net force acting on each of the following objects. In each case assume that all forces

Determine the net force acting on each of the following objects. In each case assume that all forces acting on the object are given. K/U T/I
(a) At an instant when a soccer ball is slightly off the ground, a player kicks it, exerting a force of 25 N at 40.08 above the horizontal. The force of gravity acting on the ball is 4.2 N [down]. [ans: 23 N [328 above the horizontal]]
(b) Two children pull a sled across the ice. One child pulls with a force of 15 N [N 358 E], and the other pulls with a force of 25 N [N 548 W]. There is negligible friction acting on the sled. [ans: 29 N [N 238 W]]
(c) In a circus act, a performer with a force of gravity of 4.4 3 102 N on her is lifted by two different ropes at the same time. One rope exerts a tension of 4.3 3 102 N [up and 358 left], and the other rope exerts a force of 2.8 3 102 N [up]. [ans: 3.1 3 102 N [up 388 left]]