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Class 11
Linear Motion
โฑ Reading Time : 20 Minutes
โญ Difficulty : โ โ โ โโ
โจ What You'll Learn
1. Motion of body in Straight Line
2. Definition of Motion, Rest, Position, Displacement
Speed, Velocity, Acceleration.
3. Graphical Representation of above quantity
4. Use of Calculus in above terms
๐ Main Learning Content
๐ก Did You Know?
In physics there are two types of physical quantity - Scalar (having only magnitude e.g. mass, time) and Vector (having magnitude and direction both e.g. velocity, Force)
SI unit of measurement of position is metre (m), Distance - m, Displacement -m, Speed - m/s, Velocity - m/s Acceleration - m/s2
Motion in universe is always relative no motion is absolute
For measuement of one motion we need a reference point and reference point may be in motion but calculating motion with respect to reference point we always assumes reference point be in rest
Time is a physical quantity which is always taken as positive in classical mechanic
โ Important Formula
1. Δx=x2โ−x1โ where
- = initial position
- = final position
- = displacement
2. v=Δx/Δt
3. Average speed=Total distance/Total time
4. v=limโΔt→0Δxโ/Δt=dx/dt
5. a=Δv/Δt
6. a=dv/dt
7. v = u + at
8. x = ut + 1/2 at2โโโโโ