A block with a weight of 3.2 N is at rest on a horizontal surface. A 1.1 N upward force is applied to the block by means of attached vertical string.
(a) What is the magnitude of the force of the block on the horizontal surface?
(b) What is the direction of the force of the block on the horizontal surface?
1) in the direction of the normal force on the block
2) perpendicular to the normal force on the block
3) opposite to the direction of the normal force on the block