Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary

Question

a
The force of gravity on the object is different if it is stationary or not.
b
The force of friction on the object is different if it is stationary or not
c
The force of the push on the object is different if it is stationary or not
d
The normal force on the object is different if it is stationary or not.

Answer 1

The correct answer is:

b The force of friction on the object is different if it is stationary or not.

This is because static friction (the friction that acts on stationary objects) is generally greater than kinetic friction (the friction that acts on moving objects). When an object is at rest, it must overcome static friction to get it moving. Once the object is in motion, it experiences kinetic friction, which is typically lower than static friction, making it easier to keep the object moving.