Math, asked by supriyapujahari4, 8 months ago

• Describe First Law of Motion in brief...

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Answered by Anonymous
3

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Newton's first law of motion states that  every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. It measures force.

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Answered by IdyllicAurora
76

Answer :-

Newton's First Law of Motion = This law states that every body continues its state of rest or of uniform motion in a straight line unless it is compelled by some external force to change that state. This law consists of three parts :

First Part says that a body at rest continues in its state of rest. An external force has to be applied on it to make it move. A chair lying on the floor will continue to remain there unless we displace it.

Second Part says that a body in motion continues moving in a straight path with a uniform speed. This part seems to be contrary to our everyday experience. A rolling ball comes to rest on a rought ground. This is because of force of friction. The ball moves through a larger distance on a smooth floor. If the friction were zero, the ball would continue its motion forever. This part also indicates that to increase or decrease the speed of a body moving in a straight line, a force has to be applied on it in the direction of motion or opposite to the direction of motion.

Third Part says that a body moving with a uniform speed in a straight line cannot change itself its direction of motion. To change its direction of motion, a force has to be applied normal to this direction of motion. Consider the motion of the moon around the earth. The direction of motion of the moon continuously changes. The force needed to change the direction is provided by the gravitational attraction of the earth on the moon.

More to know :-

Second law of Motion - The rate of change of linear momentum of a body is directly proportional to the applied force and the change takes place in the direction of the applied force.

Third Law of Motion - To every action, there is always an equal and opposite reaction.

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