Saved Bookmarks
| 1. |
5. A girl wearing a heel of area 1 cm² exerts a force of 20 N. The pressure on the ground is:(a) 20 pascal (b) 200 pascal (c) 2000 pascal (d) 2 pascal |
|
Answer» Answer: You MUST know that Pressure= FORCE/ Area So we have , Force= 500N Area=1 Square cm = 10^-4 Square meter. **In question the area must be 1 Square cm . So we GET Pressure= 5*10^6 Newton/Square meter = 5*10^6 Pascal. UNITS Various units are used to express pressure. Some of these derive from a UNIT of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per Squaremeter; similarly, the pound-force per square |
|