1. AOSC 200 Lesson 10

2. p. 159

3. p. 159

4. Newton’s Laws
First Law (Law of Inertia): A body at rest tends to stay at rest while a body in motion tends to stay in motion, traveling at a constant speed and in a straight line, until acted upon by an outside force

5. Newton’s Laws
Second Law (Law of Momentum): A force exerted on an object (including a parcel of water or gas) of a given mass causes the object to accelerate in the direction of the applied force and in proportion to the force divided by the objects mass.
Force equals Mass times Acceleration

6. Fig. 6-2, p. 160

7. Fig. 6.2

8. Fig. 6.3

9. Box 6.1

10. Box 6.1

11. Forces that Move the Air
Gravitational force
Is directed downward , normal to the ground
Approximately equal to the mass of the air times the gravitational acceleration
Pressure gradient force

12. Fig. 6-4, p. 161

13. Pressure Gradient Force

14. PRESSURE- GRADIENT FORCE
IS A FUNCTION OF THE PRESSURE DIFFERENCE AND AIR DENSITY.
FPC = ΔP / D.σ
WHERE
FPC = PRESSURE GRADIENT FORCE PER UNIT MASS
σ = DENSITY OF AIR
ΔP = PRESSURE DIFFERENCE BETWEEN TWO POINTS
D = DISTANCE BETWEEN THE TWO POINTS
.NEWTON’S LAW STATES FORCE=MASS TIMES ACCELERATION
FPC IS A FORCE PER UNIT MASS, I.E. IS EQUIVALENT TO ACCELERATION

16. Fig. 6-7a, p. 164

17. Fig. 6-7b, p. 164

18. Fig. 6-7c, p. 164

19. Apparent Forces in the Atmosphere
Coriolis Force
Centrifugal Force/Centripetal acceleration

20. Coriolis Effect

21. Fig. 6-9, p. 165

22. Fig. 6-10, p. 167

23. CORIOLIS EFFECT
•WEATHER MAP SHOWS THAT WINDS GO AROUND A LOW PRESSURE AREA, NOT ACROSS THE ISOBARS.
THIS DEVIATION IS A RESULT OF THE EARTH'S ROTATION AND HAS BEEN NAMED THE CORIOLIS EFFECT (CORIOLIS FORCE)
THIS FORCE ALWAYS ACTS AT RIGHT ANGLES TO THE DIRECTION OF MOTION.

24. A popular misconception