Question

(B) Newton's first law is valid from the observer in a train moving with constant velocity.
True or false ​

Answer 1

Answer:

true

In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So by definition, an inertial reference frame is a reference frame in which Newton's first law is valid. Newton's first law applies to objects with constant velocity.

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Answer 2

TRUE

Explanation :

Newton's first law: the law of inertia

Newton's first law: the law of inertiaNewton'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. ... This postulate is known as the law of inertia.