An object moves in a straight line according to the equation x=2t ^ { 3 } -3t ^ { 2 } -6t where x is in meters and t is in seconds. At what time is the net Force acting on the object=0?​

Arock collection comes from which part of earth?

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question