Three forces act on an object: f1 -> = 2.45N x - 3.24N y, F2-> = -3.97 N x -6.21 N Y and f3-> = -3.78N x + 7.72 N y. What is the net force vector? what is the magnitude of the net force vector? what is the magnitude f the objects acceleration if the objects mas is 0.271 kg?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.