1. pressure = force area = 12 N 25 cm 2 = 0.48 N/cm 2

2. pressure = force = = 2 N/cm 2 1. 1,000 N 500 cm 2 area

3. pressure = force = = 50 N/cm 2 2. 5,000 N 100 cm 2 area

4. pressure = force = = 2500 N/m 2 3. 25,000 N 10 m 2 area

5. pressure = force = = 0.5 N/cm 2 4. 2,000 N 4000 cm 2 area

6. pressure = force = = 10 N/cm 2 5. 100,000 N 10 000 cm 2 area

7. pressure = force ÷ area pressure = pressure = 50 N/cm 2 2. 5,000 N ÷100 cm 2

8. pressure = force ÷ area pressure = 3. 25,000 N ÷ 10 m 2 2,500 N/m 2 or 2,500 Pa

9. pressure = force ÷ area pressure = 4. 2,000 N ÷ 4000 cm 2 0.5 N/cm 2

10. pressure = force ÷ area pressure = 5. 100,000 N ÷ 10,000 cm 2 10 N/cm 2

11. 1 2 3 4 5 6 7

12. fig. 8, page 355