SI unit of G is $N m^{2} k g^{- 2}$ .Which of the following can also be used as the SI unit of G?

m^{3} k g^{- 1} s^{- 2}

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m^{2} k g^{- 2} s^{- 1}

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m k g^{- 1} s^{- 1}

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m^{3} k g^{- 3} s^{- 2}

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Solution

The correct option is A $m^{3} k g^{- 1} s^{- 2}$
Here $N$ represents Newton.
so we can write unit of force in place of newton, also $F = m a$
so we can write $G = M^{1} L^{1} t^{- 2} L^{2} M^{- 2} = M^{- 1} L^{3} T^{- 2}$
SI unit for mass is kilogram(kg), for length is meter(m), for time is sec(s)
so we can write unit for G in SI as $k g^{- 1} m^{3} s^{- 2}$
so best possible answer is option A.

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Similar questions

N m^{2} {k g}^{- 2}

Element	Subshell electronic configuration	No. of electrons present in the last subshell	Group number
$L i$	$1 s^{2} 2 s^{2}$	$1$	$1$
$N a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$	-	$1$
$M g$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$	-	$2$
$C a$	$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 s^{2} 3 p^{6} 4 s^{2}$	-	-