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Newton’s first law of motion
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What is first Newton's law of motion?
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First Newton's law of motion states that
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an object will remain at rest or
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continue to move with constant velocity
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in a straight line unless acted upon by
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an external force. This law is also
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known as the law of inertia. It explains
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that objects resist any change in their
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state of motion. If no external force
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acts on an object, it will not start
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moving, stop moving, or change
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direction. Inertia depends on the mass
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of the object, the greater the mass, the
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greater the resistance to changes in
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motion. This law helps explain why
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objects behave the way they do when
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forces are applied or removed. Imagine a
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book resting on a table. It will remain
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there unless someone pushes it.
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Similarly, if a ball is rolling on a
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smooth surface, it will keep moving
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unless friction or another force stops
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it. Examples: A book staying at rest on
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a table. A moving car continuing forward
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until brakes are applied. Passengers
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leaning forward when a moving vehicle
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suddenly stops. A ball continuing to
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roll until friction slows it down.
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Objects resisting changes in their
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motion.