What is Newton's law of motion

Explanation:

Newton’s first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force

2nd- is a quantitative description of the changes that a force can produce on the motion of a body. 

3rd- states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. 

explanation:

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the device is called “ rocket engine”