A 0.5m cube is sitting on top, and at the end, of a 1m wide by 3m long board. Both the cube and board are traveling at a constant velocity of 10 m/s. The board begins to decelerate at -8.5 m/s squared. The cube decelerates across the top of the board at -3 m/s squared. How much time will it take for the cube to move 1.5 meters across the top of the board. I can figure the problem out if the board was not moving but am stuck in trying to figure out how the board decelerating faster will affect the deceleration of the cube.