Question

If the unit of force is 1 kilo-newton, the length is 1 km and time is 100 second, what will be the unit of mass ?

• A. 1 kg
• B. 100 kg
• C. 1000 kg
• D. 10000 kg

Answer 1

Answer: (D)

10000 kg

Answer 2

F = M¹L¹T^–2M = $\frac{F}{LT^{- 2}}$ = $\frac{FT^{2}}{L}$

M =$\frac{\lbrack 10^{3}N\rbrack\lbrack 100s\rbrack^{2}}{\lbrack 10^{3}m\rbrack}$ = 10⁴ $\frac{N.s^{2}}{m}$ = 10⁴ kg