Class 11 Physics Chapter 3 Motion in a Plane – Revision Notes

Quick revision notes for Class 11 Physics Chapter 3 (Motion in a Plane). These Class 11 Physics Chapter 3 notes are ideal for quick revision just before exams.

Key Terms

• Scalar: magnitude only. Vector: magnitude + direction.
• Resolution: A_x=Acosθ, A_y=Asinθ.

Projectile Motion Formulas

• T = 2u sinθ/g
• H = u²sin²θ/2g
• R = u²sin2θ/g (max at θ=45°)

Circular Motion

• Centripetal acceleration a_c=v²/r, directed toward centre.
• ω=v/r; T=2π/ω.

One-Line Summary

Motion in a plane uses vector algebra to describe two-dimensional motion, covering projectile motion (parabolic path) and uniform circular motion (constant speed, changing direction, centripetal acceleration).

Written by Satish

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