If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? a. the spacecraft will not move because it only works on earth. b. the spacecraft will move and will not stop until it is stopped by an equal or opposite force. c. the spacecraft will not move due to air resistance. d. the spacecraft will move and then slowly come to a stop on its own.

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)