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Chapter5 newton’s laws

Chapter5:Applications of Newton’s laws. Chapter5 newton’s laws. Ex 5-2 To push or to pull a sled?. Friction is less when you pull, since F N is less. Ex5-4 Pulling against friction. m=10kg  s =0.3 F N =40N . Ex 5-4 A box against a wall. When mg> F fr =  s F N , the box slides down .

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Chapter5 newton’s laws

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  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

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

  7. Ex 5-6 The skier with friction K=0.01 Winning (acceleration) does not depend on mass!

  8. Dynamics of circular motion

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

  10. Ferris wheel

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

  12. Velocity dependent forces Terminal velocity }=

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

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

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

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

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

  18. 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.

  19. Problem 5-28

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