To calculate momentum: a.
add the mass of an object to its inertia.
c.
multiply the mass of an object by its inertia
b.
add the mass of an object to its velocity.
d.
multiply the mass of an object by its velocity.

The answer is b hope this

The answer should be a.

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion