4.10

·         4.10 understand that work done is equal to energy transferred

PFY p.112

1)A. Joules, force, distance

b)Newton, meter, force

d) Energy transferred

2) Wd= f x d

    Wd= 5 x 2

    Wd=10J

4)Wd= f x d

    Wd= 500N x 40m

    Wd=20000J = 20kJ

Collins p. 91

Wd= f x d

50000= 4000 x d

D= 50000/4000

D=12.5m