4.10

·         4.10 understand that work done is equal to energy transferred

PFY p.112

Collins p. 91

1.      a) joules, force, distance

b) newton, meter, force

d) energy

      2. Wd= F*d

            Wd= 5*2=10J

      4.a)  Wd= F*d

            Wd= 500*40= 2 kJ

         b) Chemical energy from food

            GPE as she walks up

1.      a) W= m*g= 400*10= 4000N

Wd= F*d

50000= 4000N*d

d= 12.5m