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Full Playlist Link   • Class 9 Physics (New Session 202324)...  

✅ In this video,

✔ Class: 9
✔ Subject: Physics
✔ Chapter: Motion
✔ Topic Name: Equation of Motion by Graphical Method
===============================================
00:00 Introduction
0:26 Equation of Motion by Graphical Method
07:58 Equation for position velocity Relation
15:01 Equation for position Time Relation
20:50 Websites Overview
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Points covered in this video:

Equation of Motion by Graphical Method
Equation for v t relation
These equations give relationship between u, v, t, a and distance travelled by the bodies.
Applicable on the motion of bodies with uniform acceleration.

Equation for v t relation
Area under v t graph gives displacemnet
By defination of acceleration

In v t graph,
S = area of trapezium ABCO
S = ½ (BD + AO) X OD
S = ½ (v + u) x t
Putting the value of t , we get
S = ½ (v + u) x (v u)/a
S = ½ v2 vu + uv u2
a
S = ½ [v2 u2]/ a
2aS = v2 u2
S = A [area of trapezium ABDO]
S = A [ABC + ACOD]
S = ½ [AC X BC] + [AO X OD]
S= ½ [t x (v u)] + ut
S = ut + ½ t [v u]
S = ut + ½ t [at]
S = ut + ½ at2 .

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