Question

In a new system of unit called star unit 1*kg=10kg,1m*=1km,1s*=1min.
Convert 1J of energy in new system of unit.

Answer 1

1 J = (1 kg ) ( 1 m/s^2) ( 1 m) = (1 kg)(1 m^2)/( s^2)
but
1 kg = 0.1 *kg
1000 m = 1 m* so 1 m = 0.001 m* and 1 m^2 = 10^-6 m*^2
60 s = 1 s* so 1 s = (1/60) s* and 1 s^2 = (1/3600) s*^2
then
1 J = (0.1 *kg)(10^-6 m*^2) (3.6*10^6) /s*^2 = 0.36 *kg m*^2 /s*^2

Answer 2

Thank u