Question

When you push something heavy the
resistance decreases as the body starts
moving, explain why?

Answer 1

In the real world, friction exists. There are two phenomena which are occurring, static and kinetic friction. Static friction occurs when the body is at rest and kinetic friction occurs when the body is in motion. Kinetic friction is usually less than static friction, and therefore more force is required to overcome static friction.

If you look at the figure below, you can see that the force required to get the body to start moving is larger than the force required to overcome kinetic friction.