1. Newton’s First Law

2. Do bombs drop straight down from an airplane?

4. Objects in motion
Stay in Motion

5. Objects at rest Stay at rest

7. “An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force."

8. unbalanced force at work here?
Is there an
unbalanced force at work here?
Stay in Motion

10. Why seat belts were invented
Inertia
Why seat belts were invented

11. A ball is launched straight up from a moving truck
A ball is launched straight up from a moving truck. Ignoring air resistance, where does the ball land relative to the truck?

12. The forward inertia of the ball is unaffected by its upward motion.

13. Newton’s Second Law of Motion

16. Fnet=ma
F= force
m = mass
a= acceleration

17. Fnet=ma
Fnet= force
m = mass
a= acceleration

18. Fnet=ma
Fnet= force
m = mass
a= acceleration

19. Fnet=ma
Fnet= force
m = mass
a= acceleration

20. Fnet=ma
Fnet= force
m = mass
a= acceleration

21. What is net force? Object accelerates
LARGER Force moving object forward
Object accelerates
Smaller force resisting forward movement

22. What is net force? Object maintains constant velocity
Force moving object forward
Object maintains constant velocity
Equal force resisting motion

23. Newton’s Third law of Motion

24. Which team is applying more force to the rope?

25. Neither- Both teams apply equal and opposite force.

28. For every action force, there is a reaction force equal in strength and opposite in direction.

29. For every action force, there is a reaction force equal in strength and opposite in direction.

33. Coanda effect

34. The tendency of fluids to attach to a surface and follow it.
Coanda effect
The tendency of fluids to attach to a surface and follow it.
Do the forces on the ball tend to be balanced or unbalanced?

35. Air moving along wing
Deflected downwards when leaving wing
Pushes craft up into the air
Newton’s 3rd Law