4.10

From: Matt Baker
Sent: 07 September 2011 14:00
To: Andrew Koomenjoe Nyaga; Arisara Amrapala; Boondaree Chang; Chrischawit Chomsoonthorn; Christopher Lo; Connor Blair Sailes; Frazer Allen Briggs; Huei-Yu Daniel Lo; Isabel Catriona McDonald; Kavin Supatravanij; Luke Michael Gebbie; Lydia Anna Foley; Morrakot Sae-Huang; Puchawin Borirackujarean; Qing Tang; Sanyam Grewal; Sebastien Grimm; Soo Hyun Lee; Tatiksha Singh; Usa Wongsanguan; Yanida Areekul; Yi-Lin Huang
Subject: 4.10 ((nogallery))

 

 

4.10

10 June 2011

11:51

·         4.10 understand that work done is equal to energy transferred

PFY p.112

Collins p. 91

 1.a) The work done ( measured in Joules) is equal to the force ( in newtons) multiplied by the distance moved (in metres).

b) 1 joule is the work done when a force of one newton moves through a distance of one metre ( in the direction of the force).

c) Work done = Energy transferred

2. Work done = Force X Distance

    Wd = 5N X 2m

          = 10 Joules

4.Work done = Force X Distance

   Wd = 500N X 40m

         = 20,000 Joules            

  The energy change is KE to GPE.

Collins p. 91

1.     400kg X 10 = 4000N

Work done = Force X Distance

50,000 = 4000N X Distance

50,000/4000 =Distance

12.5 m

 

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