Post on 18-Jan-2016
Motion
Presented byMr. Saqib TajMr. Aqib Abbas
This lecture will help you to understand:
Motion Types of motionNewton’s First Law of Motion Newton’s Second Law of Motion Newton’s Third Law of Motion Summary of Newton’s Three Laws
What is motion?
Definition :
A Body Is said to be in motion , if it changes its position with respect to its Surrounding
OR If a body continuously changes its position with respect to some observer, then it is said to be in motion.
Types of motion:There are three different types of motion.1. Translatory Motion2. Rotatory Motion3. Vibratory Motion
Translatory motion
This is the type of motion in which body moves along a line without any rotation.
Translatory motion can be divided further into three types.
Linear motion
Circular motion
Random motion
Linear Motion
Motion along a straight line is called linear motion
Rotatory motion
If a body moves in a circular path , it is called circulatory motion.
Random motion
If a body moves in an irregular manner, itsmotion is called random motion
Rotatory Motion
The spinning motion of a body about its axis or a fix Point, is called rotatory motion
Laws of MotionIntroduction
Sir Isaac Newton was the first to formulate the laws of motion known as Newton’s laws of motion . He was an English physicist and mathematician Newton's Principia formulated the laws of motion and universal gravitation, which dominated scientists' view of the physical universe for the next three centuries.
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Mr. Aqib Abbas
Newton’s First Law of Motion
The law of inertia: Every object continues in a state of rest or motion of uniform speed in a straight line unless no external force acts on it.
What is inertia?Inertia of a body is its property due to which it resists any change in its state of rest or motion.
Inertia in Action
• Rapid deceleration is sensed by the driver who lurches forward.
Newton’s Second Law of Motion
The law of acceleration:The acceleration produced
by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
Newton’s second law in equation form:
small net force, large mass small acceleration
large net force, small mass large
acceleration
Acceleration net forcemass
a Fm
Newton’s Second Law of Motion
Newton’s Third Law of Motion
Law of action and reaction:Whenever one object exerts a force on a
second object, the second object exerts an equal and opposite force on the first.