An external force is needed to start an object moving. This can be applied through pushing, pulling, or some other method that imparts kinetic energy to the object.
The frictional force needed to start an object at rest into motion is the static frictional force. This force must be overcome by an external force before the object can start moving. Once the object is in motion, the kinetic frictional force will oppose its movement.
An object keeps moving once an applied force causes it to start moving because of inertia, which is the tendency of an object to resist changes in its motion.
An object at rest cannot start moving with no forces.
An external force, such as a push or a pull, can start a moving object by overcoming its inertia and setting it in motion. Once the object is in motion, it will continue moving until acted upon by another force.
speed if no direction is needed velocity if direction is needed
The best, purest answer is: Because no force at all is required to keep a moving object moving.
The frictional force needed to start an object at rest into motion is the static frictional force. This force must be overcome by an external force before the object can start moving. Once the object is in motion, the kinetic frictional force will oppose its movement.
An object keeps moving once an applied force causes it to start moving because of inertia, which is the tendency of an object to resist changes in its motion.
An object at rest cannot start moving with no forces.
An external force, such as a push or a pull, can start a moving object by overcoming its inertia and setting it in motion. Once the object is in motion, it will continue moving until acted upon by another force.
Force is never needed to keep an object moving unless there is an opposite force trying to slow the object.
[object Object]
Gravity
the speed of an object in a particular direction
speed if no direction is needed velocity if direction is needed
The force needed to stop a moving object is equal to the object's mass multiplied by its acceleration. This force is generated by applying a force in the opposite direction to the object's motion, causing it to decelerate until it comes to a complete stop.
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.