Question

A block is placed on an inclined plane. If the block remains stationary, which of the following statements is correct?

• A. No friction acts on the block.
• B. Sliding friction acts on the block and its direction is up the inclined plane.
• C. Static friction acts on the block and its direction is down the inclined plane.
• D. Static friction acts on the block and its direction is up the inclined plane.

Answer 1

The correct option is D Static friction acts on the block and its direction is up the inclined plane.

The block will have a tendency to slide down the inclined plane because of its weight. Hence, friction will act up the plane to prevent this. As the block is stationary, static friction will come into play.