Question at position 4 The diagram below shows a board on top of two bricks with a cylinder on top of the board. The board exerts an upward force of 50 N. Which best explains this situation? Links to an external site. The diagram below shows a board on top of two bricks with a cylinder on top of the board. The board exerts an upward force of 50 N. Which best explains this situation? Links to an external site. The board has a weight of 50 N. The combined weight of the two bricks is 50 N. The cylinder has a weight of 50 N. The combined weight of the bricks, board, and cylinder is 50 N.