"inertia"
1). Because maintaining an object in motion requires no force, but causing a non-moving object to move involves acceleration which does require force. 2). Because kinetic friction is generally less than static friction.
No, it is untrue. No force is required to keep a moving object moving.
gravity
Because you're applying force the object, which unless the ground has glue or something to keep the object in place can't stop it from moving.
It is called inertia.
The best, purest answer is: Because no force at all is required to keep a moving object moving.
1). Because maintaining an object in motion requires no force, but causing a non-moving object to move involves acceleration which does require force. 2). Because kinetic friction is generally less than static friction.
Because of inertiaAn object will keep moving until an outside force is applied.
No, it is untrue. No force is required to keep a moving object moving.
the heavier and the bigger the object the more force you need to use to keep it moving . the less weight and the smaller an object is the less force you need to use to keep it moving. it always depends on the weight of the object and the size of the object.
Force is never needed to keep an object moving unless there is an opposite force trying to slow the object.
An object which is moving doesn't need a force to keep it moving.
That's true. Plus ... even if the forces on an object are BALANCED, it can keep moving forever.
to keep an object moving the way it is already moving .
gravity
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.
Because you're applying force the object, which unless the ground has glue or something to keep the object in place can't stop it from moving.