AP Physics 1 Question 75: Answer and Explanation
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5. A block is dragged along a table and experiences a frictional force, f, that opposes its movement. The force exerted on the block by the table is
- A. zero
- B. parallel to the table
- C. perpendicular to the table
- D. neither parallel nor perpendicular to the table
Correct Answer: D
D The table provides both the normal force and the frictional force. The normal will be perpendicular to the table's surface and the frictional force will be parallel to the surface. Therefore, the total force from the table (the sum of normal and friction) will be neither parallel nor perpendicular to the surface.