Basic Physics: August 2018

Quantity: -

1. Scaler Quantity- It have magnitude – no direction. Ex. Volume, Mass, Speed etc.

2. Vector Quantity- It have magnitude + direction. Ex. Velocity, Force, Torque etc.

Distance- [[Length of actual path, covered by moving object in a given time interval.]]

Unit- Meter {Scalar Quantity}.

Displacement- [[Shortest distance covered by a body in a different direction.]]

Unit- meter {Vector Quantity}.

Speed (Scaler Quantity) = Distance/Time {SI Unit- m/sec}.

Velocity (Vector Quantity) = Displacement/Time {SI Unit- m/sec}.

Acceleration (Vector Quantity) = Change in Velocity/Time {SI Unit- m/sec²}.

Circular motion- An object describes a circular path then this object’s motion is called circular motion.

Angular motion- The angle substance by the line joining, the object from the origin of circle in unit time interval is called angular velocity.

T = Time Period

n = Frequency

W = Angular Motion

nT = 1 or, n = 1/T then, W = 2π/T = 2πn

In 1 revolution, the object travels 2πr distance.

then the linear speed = 2πr/T = Wr = angular speed x radius .

Basic Physics