Answer:
By Newton's law Friction= -62.5N
Explanation:
Applying second law of Newton (which is the the sum of the forces is equal to the mass of the object who feels the forces times the acceleration)
Push+Friction= [tex]m_{box}a_{box}[/tex]
[tex]100+Friction=25*1.5=37.5\\Friction=37.5-100=-62.5 N[/tex]
Which indicates that the friction is opposed to the push and it is really appreciable, that is to say, there is a lot of friction between the box and the floor.
