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A reference point is any stationary object that can be used to describe the  change of position of the object.

• The object is in motion since it changes its position by getting far away from and you are the reference point for the moving object,\  
• Force is needed in order to make the object at rest to move and to make the moving object stop. Force is also needed for the object to accelerate and decelerate.

When an object is in motion, when there is net force, then the object will continue moving. And object at rest will remain at rest unless acted upon by  net force.

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