To make an object start moving is called acceleration, and it is done by exerting force on that object.
An object at rest cannot start moving with no forces.
Inertia
a force and inertia
Unbalanced forces
It will stay at rest and only start moving if a force is applied.
An object at rest cannot start moving with no forces.
Gravity
the speed of an object in a particular direction
Inertia
Inertia
a force and inertia
The best, purest answer is: Because no force at all is required to keep a moving object moving.
A force or acceleration
Sticky friction.
yes
Unbalanced forces
Because of friction. Every object has 2 friction coefficient values (called Mu and with its own symbol) - one stationary, and the other while the object is moving. It always takes more force (N) to move an object from a stand-still then it does to keep the same object moving.