Respuesta :
30N. Polly is pushing a box across the floor with a force of 30N the force of gravity
Answer:
A) [tex]F_f = -30 N[/tex]
Explanation:
As we know that box is not moving on the floor
so here net force on the box must be balanced
so in horizontal direction as well as in vertical direction net force must be zero
so we can say in vertical direction we have two forces
1) Normal force
2) weight
so we have
[tex]F_n + F_g = 0[/tex]
[tex]8 - 8 = 0[/tex]
similarly in horizontal direction we have
1) Applied force
2) friction force
[tex]F_{applied} + F_{friction} = 0[/tex]
[tex]30 + F_f = 0[/tex]]
[tex]F_f = -30 [/tex]
