Write about 10 points of motion
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❤️❤️motion is the change in position of an object with respect to its surroundings in a given interval of time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, and speed. ... An object's motion cannot change unless it is acted upon by a force.❤️❤️
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1. Scalar Quantities: Those physical quantities which have magnitude only and no direction.
Example: Mass, speed, volume, work, time, power energy etc.
2. Vector Quantities: Those physical quantities which have magnitude and direction both and also, obey triangle law.
Example: Displacement, velocity, acceleration, force, momentum etc.
3. Distance: It is the length of actual path covered by a moving object in a given time interval. It is a scalar quantity and is always positive.
4. Displacement: It is the shortest distance covered by a body in a definite direction. It is a vector quantity and maybe it is negative, positive or zero. In general, magnitude of displacement is less than equal to distance.
5. Speed: Distance travelled by a moving object in unit time interval. Its S.I unit is metre per second or m/s. It is a scalar quantity.
Speed = Distance/Time
6. Velocity: It is the displacement of an object in unit time interval. Its S.I unit is metre per second or m/s. It is a vector quantity.Velocity = Displacement/ Time
7. Acceleration: The rate of change of velocity of the object. It is a vector quantity. Its S.I unit is metre/second square or m/s2. If velocity decreases with time then acceleration is negative and is known as retardation.
Acceleration = Change in velocity/ Time.
8. Circular Motion: If an object describes a circular path its motion is known as circular motion. If the object moves with uniform speed, then its motion is known as uniform circular motion.
9. Angular Velocity: The angle subtended by the line joining the object from the origin of circle in unit time interval. It is denoted by omega.
Newton the father of physics established the laws of motion in his famous book “Principia” in 1687.
10. Newton’s First Law of Motion: Every body maintains its initial state of rest or motion with uniform speed on a straight line unless an external force acts on it. This law is also known as law of Galileo or law of inertia.
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