As shown in the figure, a wooden block placed on a horizontal table is subjected to three forces in the horizontal direction, namely F1, F2 and friction. The wooden block is in a static state, where F1 = 10N and F2 = 4N A. If the force F1 is removed, the resultant force of the block in the horizontal direction may be 2Nb. If the force F1 is removed, the resultant force of the block in the horizontal direction must be 0C. If the force F2 is removed, the resultant force of the block in the horizontal direction may be 2nd. If the force F2 is removed, the resultant force of the block in the horizontal direction must be 0

As shown in the figure, a wooden block placed on a horizontal table is subjected to three forces in the horizontal direction, namely F1, F2 and friction. The wooden block is in a static state, where F1 = 10N and F2 = 4N A. If the force F1 is removed, the resultant force of the block in the horizontal direction may be 2Nb. If the force F1 is removed, the resultant force of the block in the horizontal direction must be 0C. If the force F2 is removed, the resultant force of the block in the horizontal direction may be 2nd. If the force F2 is removed, the resultant force of the block in the horizontal direction must be 0

When the wood block is placed on the horizontal table, it is subjected to three forces in the horizontal direction, namely F1, F2 and friction. The wood block is in a static state. According to the equilibrium conditions, the magnitude of static friction is If f = F1-F2 = 10n-4n = 6N, we know that the maximum static friction is greater than or equal to 6N. A, B, remove force F1, because F2 = 4N, less than the maximum static friction, we know that the block is still in a static state. So a is wrong, B is correct. C, D, if remove force F2, because F1 = 10N, because the maximum static friction is greater than or equal to 6N, after the object begins to slide, if the sliding friction is 8N, then the resultant force is 2n If the force is greater than 10N and the block is still static, then the resultant force is zero. Therefore, C is correct and D is wrong

An object with a mass of 1kg is still on a smooth water surface. What is the acceleration of the object when a force F1 of 2n is applied horizontally to the right

a=f1/m=2/1=2m/s^2