- A block X of weight 10 N is stacked on a block Y of weight 20 N. Block X is fixed to a wall with a light string. The coefficients of static friction between the blocks and between block Y and the ground are both 0.2. [Figure shows block X on top of block Y, with a string connecting X to a wall, and a force F applied to Y.]
What is the value of the minimum force F required to move block Y and what is the tension T in the string immediately before block Y begins to move?
| Minimum force F/N | Tension in string T/N | |
|---|---|---|
| A. | 8 | 2 |
| B. | 8 | 6 |
| C. | 6 | 2 |
| D. | 6 | 6 |
| block X on top of block Y with string to wall |