Question

Find the value of 10J in a system having 100g , 10cm 30s as its fundamental un
its

Answer 1

Energy = (1/2)mv2

so E is proportional to  mv2

E  = 10 J  = 10 Kg (m/s)2

10 J  =  10 Kg (m/s)2  =  10 x 1000 g x (100 cm /s)2

= 10 x 10 x (100g) x (10 x 10 cm / s)2

=  100 x (100g) x (10x30  x 10cm/30s)2

= 100 x (100g) x (300 x 10cm/30s)2

= 100 x (300)2   x  (100g)  (10cm/30s)2

= 9000000  x  100g (10 cm / 30s)2 

= 9000000  new unit