Question #4fa8f

1 Answer
Gaya3
Oct 14, 2017

#1.25N#

Explanation:

#Wt=(GmM)/R^2#

#Wt_"earth"=(GmM_"earth")/R_"earth"^2#

#Wt_"unknwn plnt"=(Gm(1/2)M_"earth")/((2R_"earth")^2)#

#Wt_"unknwn plnt"=((1/2)GmM_"earth")/(4R_"earth"^2)#

#Wt_"unknwn plnt"= (GmM_"earth")/(R_"earth")^2times 1/(2times4)#

#Wt_"unknwn plnt"= (GmM_"earth")/(R_"earth")^2times 1/8#

#=>Wt_"unknwn plnt"=1/8 Wt_"earth"=1/8 times 10#

#=1.25N#

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