{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter06 - Example 5.24 A passenger on a carnival Ferris...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Example 5.24) A passenger on a carnival Ferris wheel moves in a vertical circle of radius R with constant speed. The seat remains upright during the motion. Find expressions for the force the seat exerts on the passenger at the top and the bottom.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Chapter 6 : Work and  Kinetic Energy
Background image of page 2
1. Work  Work The product of displacement and the force in the direction of displacement Unit : J (joule)=N m scalar quantity cos W F s Fs φ = = r r Constant Force, Straight line displacement
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Example 6.1) ˆˆ (160 ) (40 ) F N i N j = - r ˆˆ (14 ) (11 ) s m i m j = + r How much work is done?
Background image of page 4
Positive work, Negative work, Zero work
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Example 6.2) Work done by several forces
Background image of page 6
Work done on an object can change its motion and energy.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2. Kinetic Energy and Work-Energy  Theorem Kinetic energy : Energy of motion Work-energy theorem Work done by the net force on a particle equals the change in the particle’s kinetic energy 2 1 2 K mv = Definition of kinetic energy 2 1 tot W K K K = - = ∆
Background image of page 8
Example 6.4) Using work-energy theorem to calculate speed. The initial speed v i is 2.0 m/s. What is the speed of the sled after it moves 20 m?
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}