please send me the Notes of class 9 ● physics ☆{motion }and ☆{force and the law of motion}
Answers
Answer:
In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.
Explanation:
What are Newton's laws of motion? Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration.
Answer:
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Newton’s laws of motion, relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Sir Isaac Newton.
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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.
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Newton’s first law of motion.
Force as a concept was introduced by Newton in his first law of motion. He postulated that objects continue to do what they are presently doing unless compelled by an external agency to change it.
Force is that external agency which when acting on a body causes a change to the state of rest or motion or state of direction of the body.
A force is a push or a pull upon an object. There are two classifications for force -
a. Contact forces - When the two interacting bodies are in contact with each other. Ex : Normal force, Tension force and frictional force.
b. Non Contact forces (Action at a distance) - Forces in which the interacting bodies are not in physical contact with each other but are able to exert a push or pull despite the separation. Example - Gravitational force and Magnetic force.
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By 2nd law of Newton we measure the force
F= ma by measuring the rate of change of momentum of the body.
It is the first law that defines the force.
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sorry,If it's not helpful..cause this is Not the Whole notes! just information that I know.and also...i'm a slow typer xD :)
