Answer:
250 N
Explanation:
Assuming both girls are pushing in the same direction
Given
Total amount of force,they exert on box= 500 N
let force exerted by Macy = [tex]F_{M}[/tex]
force exerted by Sam= [tex]F_{S}[/tex]
⇒ [tex]F_{M}[/tex]+[tex]F_{S}[/tex]=500 N
But also given both girls push with equal amount of force
⇒ [tex]F_{M}[/tex]=[tex]F_{N}[/tex]
Therefore
[tex]F_{M}[/tex]+ [tex]F_{M}[/tex]=500 N
[tex]2\times F_{M}[/tex]=500 N
[tex]F_{M}[/tex]=250 N
⇒ [tex]F_{M}[/tex]=250 N , [tex]F_{N}[/tex]= 250 N