1. Chapter5:Applications of Newton’s laws
Chapter5 newton’s laws

2. Ex 5-2 To push or to pull a sled?
Friction is less when you pull, since FN is less

3. Ex5-4 Pulling against friction
m=10kg
s=0.3
FN=40N

4. Ex 5-4 A box against a wall
When mg>Ffr=sFN,
the box slides down

5. Ex 5-5 Two boxes and a pulley

7. Ex 5-8 A plane, a pulley and two boxes

10. Ex 5-6 The skier with friction
Winning (acceleration) does not depend on mass!

12. Dynamics of circular motion

13. Dynamics of Uniform Circular Motion
Center-seeking Acceleration and Force
Frad = m arad

15. Ferris wheel

17. Conical Pendulum
Center-seeking Force: Tension
Circular Motion

19. Velocity dependent forces
Terminal velocity }=

20. No Skidding on a Curve (I)
Center-seeking Force : Static Friction
msmin = ?

21. No Skidding on a Curve (II)
r = 50.0 m C
m = 1000 kg
v = 14.0 m/s

23. No Skidding on Banked Curve Design Speed
Ff : not required
FN cosq = m g
arad

26. No Skidding on Banked Curve Overview
Notes:
Coordinates
x-y
Acceleration
+x direction Ff
arad

27. Problem 5-18
Starting point=9.3m up

28. Problem 5-24 s=0.4 K=0.3 (a) What is min. m before it moves?
(b) What is m for moving at v=const.

29. Problem 5-28