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Wiki User
∙ 12y ago
Wiki User
∙ 12y agoAccording to Newton's first law of motion, an object at rest stays at rest, and an object in motion stays in motion in a straight line. The only thing that can change either situation is the action of an unbalanced force on the object (i.e. an object that is moving does not need to be acted upon by an external force to stay in motion, but only to change its motion in some way).
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Up to the moment in which electromagnetism is not in the play, the Galileo relativity principle holds.
The state of motion or quiet of an object is not an intrinsic property of the object, but it depends on the observation reference system.
In particular, if it exists a so called inertial system where the object is in uniform motion (linear trajectory, constant velocity) it is in uniform motion in all inertial systems and in one of them is still.
A "material" force, that is a force generated by an interaction with other objects (at distance or by collision) is needed to create an acceleration in an inertial reference system, that is to change velocity. Differently from velocity, acceleration is the same in all inertial systems and is proportional to material forces via the object mass.
If I pass from an inertial system to a non inertial one, for example the observer starts to rotate, other kind of forces are generated, called apparent. They are not due to interaction between objects, but to the fact that the observer is not in an inertial system.
These forces can be, let us say, created and eliminated by changing reference system and in no way are related to the specific object interaction with other objects or to its motion in a reference system of the inertial class.
Wiki User
∙ 13y agoyes. A force is required to work against the friction & other dissipative forces so that a body shall execute motion. If the body is moving where there is no dissipative forces, it will continue in motion without any force except the initial one.
Wiki User
∙ 12y agoNo force is needed to keep an object moving. An object with no forces on it
keeps moving at a constant speed in a straight line.
If there is any force acting on it to make it slow down, then you need just enough
force to cancel the first one, in order to keep it moving.
Wiki User
∙ 14y agoNo force is needed to keep an object moving, except to counteract friction forces that would slow the object down.
Wiki User
∙ 12y agoThe net force must be zero otherwise the object would experience acceleration and thus not constant motion.
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Is it true that to keep an object moving a force must be apllied?
No, it is untrue. No force is required to keep a moving object moving.
Why is less force needed to keep an object moving than to start the object in motion?
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.
What is the force that keep an object moving?
gravity
What force is needed to keep an object in circular motion?
Centripetal force
Why is force needed to keep object moving in a circle?
Because if there's no force acting on an object, then the object continues moving with constant speed in a straight line. Newton made that simple statement a little over 300 years ago, and nothing in our everyday experience has ever disproved it.
Is force always neede to keep an object moving?
Force is never needed to keep an object moving unless there is an opposite force trying to slow the object.
Why is less force neede needed to keep an object moving than to start the object in motion.?
The best, purest answer is: Because no force at all is required to keep a moving object moving.
How much force is needed to move an object?
No force is needed to keep an object moving. An object with no forces on it keeps moving at a constant speed in a straight line. If there is any force acting on it to make it slow down, then you need just enough force to cancel the first one, in order to keep it moving.
How much force is needed to keep a 2kg object moving?
No force is needed to keep an object moving. An object with no forces on it keeps moving at a constant speed in a straight line. If there is any force acting on it to make it slow down, then you need just enough force to cancel the first one, in order to keep it moving.
Is it true that to keep an object moving a force must be apllied?
No, it is untrue. No force is required to keep a moving object moving.
What is the force that keeps an object in motion?
An object which is moving doesn't need a force to keep it moving.
Why do you have to exert extra force to get a heavy object moving and then have to keep applying force to keep it moving at constant velocity?
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.
Why is less force needed to keep an object moving than to start the object in motion?
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.
What is the force that keep an object moving?
gravity
No force is necessary to?
to keep an object moving the way it is already moving .
The inward force needed to keep an object moving in a circle?
The force that keeps objects moving in a circle is known as the centripetal force, which acts towards the center. The velocity of the object moving in a circle will be tangential to the circle.
What force is needed to keep an object in circular motion?
Centripetal force
