May 18, 2020

KINEMATICS-2 (MASTER ADVANCED PHYSICS)

KINEMATICS-2 (MASTER ADVANCED PHYSICS)
MASTER ADVANCED PHYSICS 
(For all Top Exams) 

Video – 2 
KINEMATICS – 2

Acceleration –

Change in velocity

Uniform acceleration

Rate of change in velocity is constant

Change in Velocity in one second.

V= 0 t= 0

V= 10 t= 1

V= 20 t= 2

V= 30 t=3

A = 10m/s /s

Equations of motion for uniformly accelerating body

U, v, a, S, t

V – u / t = a or v = u + at

S = ut + ½ a t*t

V2 – u2 = 2as

Derivation of the three equations

V= u + at is by definition true

(U + v) / 2 = average velocity = s / t

Ut + vt = 2s

Ut + (U + at)t = 2s

Ut + ut + at 2 = 2s

Dividing by 2

S = ut + ½ at2

With the first two equations we can get

V2 – u2 = 2as

by simple substitution

Displacement – time graph for uniformly accelerated motion

Graph – parabola


Velocity – time graph for uniformly accelerated motion

Graph – slanted straight line