PHYSICS · Multi-part · CBSE · Physics · Pressure, Winds, Storms, and Cyclones · Pressure, Winds, Storms, and Cyclones
Problem
(a) Define pressure and state its SI unit.
(a) Define pressure and state its SI unit.
(b) A drawing pin has a sharp, pointed tip while its head is made broad and flat. Explain why this design makes the pin easier to push into a wooden board.
(c) A student presses the board first with the flat side of a metallic ruler and then with the edge of the same ruler, each time applying approximately the same force. Explain, without doing any numerical calculation, why the board gets dented in the second case but not in the first.