CBSE Class 11 Physics Notes Chapter 3: Physics is a subject that demands constant practice until you get it right, just like any other. Students always find class eleven physics challenging because of the many complicated terminology, equations, and rules found in these important physics chapters.
To effectively understand the themes, we must be familiar with the fundamental formulas and solve problems regularly. Chapter 3 of Class 11 Physics Straight-line motion is a crucial subject since it appears in many board exam problems each year.CBSE Class 11 Physics Notes Chapter 3 PDF
Rest
When an object remains in the same position in relation to its surroundings, it is said to be at rest. For instance, a classroom's white board is at a resting position with regard to the classroom.Motion
When an object shifts in relation to its surroundings, it is considered to be in motion. For example, we are considered to be in motion with respect to the ground when we run, walk, or ride a bike.Rest and Motion are Relative
Motion and rest depend on the viewer. It is possible for an object to be at rest in one scenario and in motion in another. For instance, while a spectator is standing on the ground, the driver of a moving car is in motion, but when the same observer is in the passenger seat, the driver is at rest.Position
An object's position is always represented in relation to a reference point, which is typically referred to as the origin. We take into consideration two physical quantities to indicate the change in position.Distance
It speaks of the path that the thing actually takes when moving.
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Scalar quantities
Scalar quantities are those physical quantities that have only magnitude and no direction. Scalars include things like mass, length, time, distance, velocity, work, and temperature.Vector quantities
Vector quantities are those physical quantities that possess both magnitude and direction. Vectors include things like force, momentum, torque, acceleration, velocity, and displacement.Average velocity
It is defined as the displacement or change in position divided by the displacement's time period.
Average speed
It is calculated by dividing the total path length travelled by the complete amount of time the motion has occurred.
Instantaneous velocity
Instantaneous Speed
Uniform motion
When a body travels the same distances in the same amounts of time, it is said to be in uniform motion. In this case, motion has a constant velocity. Additionally, there is no acceleration while in motion. With x, v, a on the Y-axis and t on the X-axis, we may illustrate this on a number line as follows:Non-Uniform motion
When a body travels the same distances in the same amounts of time, it is said to be in uniform motion. In this case, motion has a constant velocity. Additionally, there is no acceleration while in motion. With x, v, a on the Y-axis and t on the X-axis, we may illustrate this on a number line as follows: