Question

If the unit of force is $12$ N, that of length is $3$ m and that of time is $4$ s, the unit of mass in new system is:

• A. 6.4 kg
• B. 64 kg
• C. 640 kg
• D. 128 kg

Answer 1

Answer: (B)

64 kg

$F=ML{T}^{-2}$
$12=M\times 3\times 1/16$
$4\times 16=M$
$\Rightarrow M=64kg$