Hello, I am new to this forum. I am having trouble with conceptualizing trajectories of objects. Here is a specific question that I can figure out: If a car is travelling down the hill with an incline and an object is thrown out of the car, what is the trajectory of the object? Would the object move in a half inverted parabola shape? How can I tackle such questions? Another question on kinetic energy and momentum conservation: A 2.00 kg mass is moving at 2.00 m/s and strikes another 2.00 kg mass which is stationary. If kinetic energy is conserved, how will they move following the collision. Assume that the fist mass is moving to the right. My guess is that the second will move to the right with a speed of 2m/s while the first mass will become stationary. I am not sure and would appreciate if someone could help explain this. Thanks!