4.10

·         

4.10 understand that work done is equal to energy transferred

PFY p.112

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. 

d) Work done = energy transferred. 

Wd = F x d

Wd = 5 x 2

Wd = 10 J

Wd = F x d

Wd = 500 x 40

Wd = 20,000 J

Collins p. 91

Wd = F x d

50,000 = 400x10 x d

50,000 / 4,000 = d

d = 12.5 m 

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