Which factors can affect the amount of friction acting on an object on a solid surface? a. the weight of the object and the force of a push
b. the type of surface and the weight of the object
c. the force of a push and the motion of the object
d. the motion of the object and the type of surface mark this and return

B. The type of the surface and the weight of the object  

Explanation:

Friction is a contact force - it depends on how the object and the surface are interacting (less friction on slippery surfaces for example). It is equal to the coefficient of friction times the normal force, which depends on the weight of the object. The question is tricky though, because friction can be different if the object is moving and not.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents