Motion in a Plane
Maharashtra Board · Class 11 · Physics
Quick revision notes for Motion in a Plane — Maharashtra Board Class 11 Physics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Rectilinear Motion (Vector Form)
- Rectilinear motion is motion along a straight line where position, velocity, and acceleration are collinear
- Vector notation helps in extending concepts to two-dimensional motion
- Displacement is a vector quantity while distance is scalar
Motion in Two Dimensions
- Motion in a plane requires vector analysis with x and y components
- Position vector: r⃗ = xî + yĵ
- Velocity components are independent: vₓ = dx/dt, vᵧ = dy/dt
Relative Velocity
- Relative velocity is the velocity of one object as observed from another moving object
- v⃗ₐB = v⃗ₐ - v⃗B (velocity of A relative to B)
- v⃗Bₐ = v⃗B - v⃗ₐ = -v⃗ₐB (velocity of B relative to A)
Projectile Motion
- Motion of an object under gravity alone after being projected with initial velocity
- Horizontal motion: uniform velocity (aₓ = 0)
- Vertical motion: uniformly accelerated (aᵧ = -g)
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