define inertia. write first law of motion with example.
according to class 9th
Answers
Law of inertia, also called Newton's first law, postulate in physics 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.
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Answer:
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
Newton's first law of motion states that an object at rest remains at rest and an object in motion remains in motion with the same velocity unless acted upon by what we call an unbalanced force
Ex:The force of gravity pulling down is balanced by the force of my kitchen table pushing up on my cup of coffee.
Explanation:
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